Occasionally available for purchase in all Towns with a limited stock of one to three (1-3) units.
Can be obtained from Treasure Chests.
Drop from mob units.
Effects of Herb will scale with Pipe Upgrades as according:
Pipe Level 0: -1 Poison
Pipe Level 1: -2 Poison
Pipe Level 2: -3 Poison
Pipe Level 3: -4 Poison