How does Killer Vegan skill work?

Solution 1:

There are 5 skills under Killer Vegan. The Dredmor wiki has been updated with detailed information on these skills and debuffs.

• Green Harvest - You can eat non-living things for food, including the corpses of things like robots and demons. There's a 50% chance of getting "Food" when you kill a non-living thing. Killing vegetables has a chance to drop fruit.
• Animal Friend - Charm an animal (for 100 turns) to fight for you. (54 turn cooldown)
• Clean Living - You gain a health and health regen boost, in addition to +8 XP when you kill a vegetable.
• Aura of Self-Righteousness - Chance to do additional damage and blind (8%) when you attack.
• Level 5 Vegan - In addition to extra health benefits, you can activate the "Break the Circle of Life" skill every 120 turns. This uncurses you, effectively removing any debuffs.

If you have Killer Vegan as a skill tree, and you injure an animal, you'll get a debuff of -5 to most of your primary skills, plus -5 health and mana regen for 200 turns. This debuff stacks 3 times. There's also a debuff for eating non-Vegan food, and another (more minor) debuff if you have Clean Living.