ROT

1 APcost
1cooldown (turns)
one foetarget
3ranks

Unlocks at level 47 and grows 2% per level above it.

Ranks

RankEffect
1HIT 60%, +5% PER POISON, POISON 4, WEAKEN 1
2HIT 70%, +5% PER POISON, POISON 6, WEAKEN 1
3HIT 80%, +5% PER POISON, POISON 8, WEAKEN 1

Shown for a raccoon that has just met the unlock; higher level makes it stronger.