From Guild Wars 2 Wiki
Bun-nado is a tornado of bunnies in Super Adventure Box. The Bun-nado is summoned after slaughtering all the bunnies in the starting area of the first two zones in World 1 and zone 1 of World 2, but will fall apart if the player moves too far away from it.
- Bun-nado - Bites the foe, knocking them down. Getting hit will grant the Determined effect for 3 seconds.
- The Bun-nado is a reference to the Legend of Zelda series, where Cuccos will begin swarming over Link if you attack them too much.