"Give your army the upper hand against enemy troops with this deadly poison! Defending units that linger in a Poison Spell's toxic cloud will move slower, attack slower and take damage with increasing severity over time. Poison Spells do not affect structures ."
| Level | Max damage per second | Speed decrease | Attack rate decrease | Research cost | Research time | Laboratory level required |
|---|---|---|---|---|---|---|
| 1 | 90 | 26% | 35% | N/A | N/A | N/A |
| 2 | 115 | 30% | 40% | 5,000 | 6h | 6 |
| 3 | 145 | 34% | 45% | 10,000 | 18h | 7 |
| 4 | 180 | 38% | 50% | 21,500 | 2d | 8 |
| 5 | 220 | 40% | 55% | 35,000 | 3d | 9 |
| 6 | 260 | 42% | 60% | 55,000 | 4d | 10 |
| 7 | 280 | 44% | 65% | 77,500 | 5d | 11 |
| 8 | 300 | 46% | 68% | 100,000 | 6d 12h | 12 |
| 9 | 320 | 48% | 70% | 135,000 | 7d | 13 |
| 10 | 340 | 50% | 72% | 175,000 | 8d | 14 |
| 11 | 360 | 51% | 73% | 230,000 | 9d 16h | 15 |
| 12 | 380 | 52% | 74% | 350,000 | 14d 12h | 16 |