Stonebound Focus is a rare major card out of the New mechanic pool. Attunement: your Special deals Stone damage. One Attunement per input.

A stone Special dumps Crumble in chunks, which suits the decaying meter — spike it to a Sunder rather than trickling. Strong boss tech through Stagger; pairs nicely with Force and knockback play.

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.

It pushes your build toward Stone.

Only one card can reshape that ability this way — this one, or Flamebrand Focus, Rimebound Focus, Stormbound Focus, Venombound Focus, Bloodsworn Focus, Lightsworn Focus and Voidtouched Focus. Take one and the rest are gone for the run.