The Mine a Planet S-tier drills are the three Legendary-tier crafts that define the end-game meta — the Mythril Destroyer, the Cosmic Reaper, and the Astral Annihilator. These three drills deal the highest damage in the game, have the strongest ore multipliers, and are the only drills worth binding across multiple rebirths. This tier list page covers each S-tier drill in detail, including base damage stats, ore multipliers, recommended planets, reforge priority, and the optimal moment to bind each one for maximum Prestige Point payout.
For the broader drill tier list including A, B, and C tiers, see our complete Mine a Planet drill tier list hub. For the underlying crafting recipes, see our Mine a Planet crafting tier progression guide. This principle applies broadly across all progression stages and is one of the most reliable optimization levers in the game.
S-Tier Drill Overview
The three S-tier drills are designed to be the long-term companions for end-game players. Each one is gated behind a specific crafting milestone, and each one unlocks the next planet. The damage scaling between them is steep enough that the newest drill always out-damages the previous one by a significant margin.
| Drill | Tier | Damage | Ore Multiplier | Unlocks Planet |
|---|---|---|---|---|
| Mythril Destroyer | Legendary | 1,250 | 8x | Nebula |
| Cosmic Reaper | Legendary | 2,400 | 16x | Nebula (extended) |
| Astral Annihilator | Legendary | 4,800 | 32x | Void (post-2nd Rebirth) |
The damage numbers above are based on community testing and may shift slightly with future patches, but the relative ranking has been stable since the UPDATE1 patch. The exact mechanics vary slightly by patch, but the underlying principle remains consistent across all player playstyles.
Mythril Destroyer Deep Dive
The Mythril Destroyer is the first S-tier drill and the most important craft for players transitioning from mid-game to end-game. It requires 2 Mythril Bars plus the Solar Flare prerequisite craft, and it unlocks Nebula, which is the source planet for Stardust and Void Shards.
In terms of combat performance, the Mythril Destroyer has roughly 1,250 base damage and an 8x ore multiplier. That damage is enough to break Nebula nodes in 4-5 hits with a fresh craft, or 2-3 hits with a high Ore Multiplier reforge. The ore multiplier is the key stat — at 8x, every swing yields 8x the base ore drop, which translates into a massive Drill Piece income boost on every planet.
| Stat | Base | With High Reforge |
|---|---|---|
| Damage | 1,250 | 1,400-1,500 |
| Ore Multiplier | 8x | 12-15x |
| Drill Speed | 1 swing/1.5s | 1 swing/1.0s |
| Rare Drop Chance | +5% | +15-20% |
The Mythril Destroyer is the recommended bind for your first rebirth, because the Prestige Point payout is significantly higher than binding a Rare or Epic drill. For a complete walkthrough of the rebirth math and the optimal bind timing, see our Mine a Planet rebirth timing guide.
Cosmic Reaper Deep Dive
The Cosmic Reaper is the second S-tier drill and the first to require a Cosmic Core. It requires 1 Cosmic Core plus the Quantum Borer prerequisite craft, and it is the natural upgrade path from the Mythril Destroyer once you have a reliable Stardust and Void Shard supply.
The Cosmic Reaper has roughly 2,400 base damage — almost double the Mythril Destroyer — and a 16x ore multiplier. The damage jump is significant enough that you can clear Void planet nodes in 3-4 hits, which makes the Cosmic Reaper the fastest end-game farming drill available before you unlock the Astral Annihilator.
| Stat | Base | With High Reforge |
|---|---|---|
| Damage | 2,400 | 2,700-2,900 |
| Ore Multiplier | 16x | 22-28x |
| Drill Speed | 1 swing/1.2s | 1 swing/0.9s |
| Rare Drop Chance | +8% | +18-25% |
The Cosmic Reaper is the recommended bind for your second rebirth, after you have reached level 50 and have unlocked the second Rebirth option. Binding a Cosmic Reaper grants roughly 2x the Prestige Points of binding a Mythril Destroyer, which means the second rebirth cycle is significantly more profitable than the first.
Astral Annihilator Deep Dive
The Astral Annihilator is the third and final S-tier drill, and it is the highest-tier drill in the entire game. It requires 3 Cosmic Cores plus 100 Stardust plus the second Rebirth, and it unlocks the Void planet for endgame grinding. Crafting the Astral Annihilator is the central end-game goal for most players.
The Astral Annihilator has roughly 4,800 base damage — double the Cosmic Reaper — and a 32x ore multiplier. With a high Ore Multiplier reforge, the Astral Annihilator can break Void planet nodes in 1-2 hits, which makes it the most efficient farming drill in the game by a wide margin.
| Stat | Base | With High Reforge |
|---|---|---|
| Damage | 4,800 | 5,500-6,000 |
| Ore Multiplier | 32x | 40-50x |
| Drill Speed | 1 swing/1.0s | 1 swing/0.7s |
| Rare Drop Chance | +12% | +25-35% |
The Astral Annihilator is the recommended bind for your third and subsequent rebirths. Because the drill is so expensive to craft, players typically bind it on every cycle after the third rebirth to maximize Prestige Point payouts. For the longest-term players, the Astral Annihilator is the only drill that should ever be bound.
Why All Three S-Tier Drills Are Worth Crafting
The Mythril Destroyer, Cosmic Reaper, and Astral Annihilator are all worth crafting because each one unlocks a new tier of farming efficiency. Skipping any of them means leaving significant Drill Piece income on the table, particularly in the late-game grinding sessions on Nebula and Void.
The order of crafting should follow the rebirth cycle: craft the Mythril Destroyer before your first rebirth, the Cosmic Reaper before your second rebirth, and the Astral Annihilator after your second rebirth. This sequence aligns your crafting milestones with your rebirth milestones, which maximizes the Prestige Point payout at each reset.
Frequently Asked Questions
Is the Mythril Destroyer still useful after I craft the Cosmic Reaper?
Yes, the Mythril Destroyer remains useful as a backup drill for reforge experiments and for farming on planets where the Cosmic Reaper might be wasted. Many end-game players keep both drills in their inventory for different use cases. Yes, this item is valuable at every stage because it provides a permanent bonus that compounds with other systems.
Can I skip the Cosmic Reaper and go straight to the Astral Annihilator?
No, the Astral Annihilator requires 3 Cosmic Cores, which means you must craft 3 Cosmic Reapers worth of cores before you can craft the Astral Annihilator. The Cosmic Reaper is a mandatory intermediate craft. Yes, but the optimal approach depends on your current progression stage and your stockpile of supporting materials.
Should I reforge every S-tier drill I craft?
Reforge the Mythril Destroyer aggressively because it is the cheapest to reforge and the most commonly bound. Reforge the Cosmic Reaper selectively, only after you have a stable Drill Piece reserve. Reforge the Astral Annihilator only on the bind you intend to keep across the longest rebirth cycle.
What is the best S-tier drill for farming Drill Pieces?
The Astral Annihilator with a high Ore Multiplier reforge is the best Drill Piece farming drill in the game. The 32x base ore multiplier (40-50x with reforge) makes it 2x more efficient than the Cosmic Reaper on the same planet.
Should I bind all three S-tier drills across rebirths?
You can only bind one drill per rebirth, so prioritize the highest-tier drill available. Bind the Mythril Destroyer on your first rebirth, the Cosmic Reaper on your second, and the Astral Annihilator on your third and subsequent rebirths. Generally yes, but the optimal timing depends on your current resource reserves and your active biome's node HP profile.
Reforge Priority for S-Tier Drills
The reforge priority across the three S-tier drills depends on which drill you intend to bind across your next rebirth. The recommended priority is Mythril Destroyer first (because it is the cheapest to reforge and the most commonly bound), Cosmic Reaper second (because it is a meaningful step up), and Astral Annihilator third (because the material investment is so large that you want to get it perfect before binding).
| Drill | Reforge Cost (per roll) | Recommended Roll Count |
|---|---|---|
| Mythril Destroyer | 500,000 DP | 20-30 rolls for high Ore Multiplier |
| Cosmic Reaper | 1,500,000 DP | 15-20 rolls for high Ore Multiplier |
| Astral Annihilator | 5,000,000+ DP | 10-15 rolls for high Ore Multiplier |
The roll counts above are community-tested averages. Some players will hit a perfect roll in fewer attempts, while others will burn through 50+ rolls without seeing a high Ore Multiplier. For the complete reforge strategy, see our Mine a Planet reforge strategy guide.
Why All Three S-Tier Drills Use Mythril as a Base Material
A common question is why all three S-tier drills require Mythril-related materials even though the Astral Annihilator does not directly use Mythril Bar. The answer is that the crafting bench has a strict prerequisite chain — the Astral Annihilator requires the Cosmic Reaper prerequisite, which requires the Quantum Borer prerequisite, which requires Mythril Bar materials. The Mythril unlock is therefore a prerequisite for all three S-tier crafts, even the ones that do not directly use Mythril Bar.
This prerequisite chain is what makes the Volcano planet so important for end-game players. Without Mythril Bar materials stockpiled, you cannot craft any of the three S-tier drills, regardless of how much Stardust or Void Shards you have farmed. Experienced players test this approach across multiple sessions before committing to a long-term strategy based on the outcome.
Which S-Tier Drill Should You Craft First
The optimal S-tier craft order is Mythril Destroyer → Cosmic Reaper → Astral Annihilator, which exactly matches the planet unlock order (Nebula → Nebula extended → Void). The Mythril Destroyer is the first S-tier craft because it is the cheapest and unlocks the most farming efficiency. The Cosmic Reaper comes second because it requires the Mythril Destroyer as a prerequisite. The Astral Annihilator comes last because it requires the second Rebirth as a prerequisite.
Players who try to skip the Mythril Destroyer and go straight to the Cosmic Reaper will find that the bench greys out the recipe. Always craft in the recommended order. Combining this insight with active pet bonuses and prestige multipliers yields compounding benefits that accelerate overall progression.
Common Mistakes to Avoid With S-Tier Drills
The most common mistake is to reforge an S-tier drill before binding it, which means the reforge stats persist across the rebirth. While this sounds like a benefit, it actually limits your reforge experimentation — if you bind a drill with a low Ore Multiplier roll, you cannot re-reforge it without losing the bind. The recommended approach is to reforge on a separate drill, then bind only after you have a high Ore Multiplier roll.
The second mistake is to craft a second Mythril Destroyer or Cosmic Reaper without first checking the trade market. Because these drills are tradeable, the cost of buying a pre-crafted one is often lower than the material investment to craft a new one. Players who are not actively running a crafting pipeline should check the trade market before queuing the bench.