"Ever wish you could ignore a whole chunk of that enemy base ? The Overgrowth Spell traps nearby Buildings in tough roots, stopping Defenses attacking. Troops ignore trapped Buildings."
| Level | Duration | Research cost | Research time | Laboratory level required |
|---|---|---|---|---|
| 1 | 22s | N/A | N/A | N/A |
| 2 | 23s | 62,500 | 5d 12h | 10 |
| 3 | 24s | 125,000 | 8d 12h | 12 |
| 4 | 25s | 175,000 | 10d | 14 |