006 Cannonball
[E]BLASTING OFF: Charge, Force Blast. Force Blast as FREE. // When an opposing character knocked back by Cannonball has its knockback path stopped due to blocking terrain, the edge of the map, or higher/lower elevation, after resolutions remove an action token from Cannonball.
Source: https://win.wizkids.com/bb/viewtopic.ph ... =10#p34057