Slime Bank
Its levels cost Marble Bricks. Later levels also cost Granite Bricks (from level 20), Basalt Bricks (from level 40) and Mud Bricks (from level 60).
Ranks
| 1 | 10 Slime Ball | Captured Slimes: 50 |
| 2 | 100 Slime Ball | Captured Slimes: 500 |
| 3 | 5,000 Slime Ball | Captured Slimes: 5,000 |
| 4 | 3  Black Pearl 50,000 Slime Ball | Captured Slimes: 50,000 |
| 5 | 100 Black Pearl 500,000 Slime Ball | Captured Slimes: 500,000 |
Bonuses
| Level 5 | Slime Coin Efficiency + 0.050% |
| Level 10 | Gold Gain + 10% |
| Level 15 | Slime Coin Efficiency + 0.075% |
| Level 20 | Gold Gain + 20% |
| Level 25 | Slime Coin Efficiency + 0.100% |
| Level 30 | Gold Gain + 30% |
| Level 35 | Slime Coin Efficiency + 0.150% |
| Level 40 | Gold Gain + 40% |
| Level 45 | Slime Coin Efficiency + 0.200% |
| Level 50 | Gold Gain + 50% |
| Level 55 | Slime Coin Efficiency + 0.250% |
| Level 60 | Gold Gain + 75% |
| Level 65 | Slime Coin Efficiency + 0.300% |
| Level 70 | Gold Gain + 100% |
| Level 80 | Slime Coin Efficiency + 0.500% |
| Level 90 | Slime Coin Cap + 1,000% |
| Level 100 | Slime Coin Cap + 10,000% |
| Rank 1 | Unlock Slime Bank in Upgrade tab |
| Rank 2 | Unlock new Slime Bank upgrades |
| Rank 3 | Unlock new Slime Bank upgrades |
| Rank 4 | Unlock new Slime Bank upgrades |
| Rank 5 | Unlock new Slime Bank upgrades |
Research
 Stone | Grants interest on currently held Slime Coin every 10 minutes | +0.1% (up to 20%) |
 Crystal | Restock amount of materials in Shop | +1 |
 Leaf | Slime Coin Cap | +2% |
History
Changes to this building across game updates.
- Bonuses
- −Level 5 · Slime Coin Efficiency 0.050%
- −Level 15 · Slime Coin Efficiency 0.075%
- −Level 25 · Slime Coin Efficiency 0.100%
- −Level 35 · Slime Coin Efficiency 0.150%
- −Level 45 · Slime Coin Efficiency 0.200%
- −Level 55 · Slime Coin Efficiency 0.250%
- −Level 65 · Slime Coin Efficiency 0.300%
- −Level 80 · Slime Coin Efficiency 0.500%
- +Level 5 · Slime Coin Efficiency + 0.050%
- +Level 15 · Slime Coin Efficiency + 0.075%
- +Level 25 · Slime Coin Efficiency + 0.100%
- +Level 35 · Slime Coin Efficiency + 0.150%
- +Level 45 · Slime Coin Efficiency + 0.200%
- +Level 55 · Slime Coin Efficiency + 0.250%
- +Level 65 · Slime Coin Efficiency + 0.300%
- +Level 80 · Slime Coin Efficiency + 0.500%
- +Level 90 · Slime Coin Cap + 1,000%
- +Level 100 · Slime Coin Cap + 10,000%
- Bonuses