The Wisdom Wolf Decay is a ninjutsu unique to Saiken.
Opening its mouth, Saiken releases a dense corrosive gas (腐らせるガス, kuzaraseru gasu). Because of its gaseous nature, it can cover a wide cross-area in a short amount of time and is strong enough to instantly disintegrate a rather large tree.
In the anime, Utakata was seen using this technique in a liquid state as a stream of acid, potent enough to corrode the ground.
- When Utakata used this technique in the anime, it was white. However, when used by Saiken, it was pink in the anime, but white in the video games.