This article's content is accurate to the most recent public game version, 0.4.8d.
"A large bunny produces carnage as it pleases. Attacks 1 random enemy twice. 50% chance for Stunned."
Cost: 2 
Source: Catherine (starting skill)
Philosophischer Tod is a bunny skill that only Catherine can use. Using it deals two bouts of heavy 
Blunt damage to a random opponent, with a 50% chance to cause 
Stunned. However, due to the excessively powerful Ultimative Dunkle Nova only needing one more blue bunny, it may be wise to use that instead, unless faced with a single opponent.
Trivia
Philosophischer Tod, like all of Catherine's moves, is made out of garbled German, and translates to Philosophical Death, which isn't very appropriate for such a powerful physical attack.