Crumble is the Stone status. Stone status filling a meter that decays until its payoff fires. The meter needs status-carrying hits worth 26% of the target's maximum health, decaying 0.08 per tick. Payoff: sunder for 90 ticks. Sundered targets lose 50% of their armor and take 40 Stagger. Seismic upgrades the payoff into a 3.5-unit shockwave for 160% of the hit. On bosses the threshold becomes Stagger plus a 90-tick window.

Crumble buildup, Stagger, armor break and Fortify. Its payoff is Seismic, and the affinity page lays the eight of them side by side.

2 draft cards can put it on your build: Crushing Weight and Landslide Step.

1 relic effect applies it straight off your gear: Mason's Eye.