Avalanche is a legendary major card out of the New mechanic pool. Heavy Cleave narrows to a 90° lane 7 u long at 130% damage with 3 u knockback.

You can take it once · it only turns up when your Main ability can actually use it · it can be offered for 0 of the 34 abilities.

Only one card can reshape that ability this way — this one, or Earthsplitter and Triple Sweep. Take one and the rest are gone for the run.