Crushing Blow is a rare major card out of the Synergy pool. Your Special deals +50% damage, and +60% knockback if it shoves, with a 20% longer cooldown.

You can take it once · it only turns up when your Special ability can actually use it · it can be offered for 12 of the 34 abilities.

Only one card can reshape that ability this way — this one, or Keen Focus, Vast Focus, Longshot Focus and Lingering Focus. Take one and the rest are gone for the run.