Fault Line is a legendary major card out of the New mechanic pool. Groundbreaker's wave leaves a 6 s fissure along its lane pulsing 3% every 0.5 s; the wave is 85%.

You can take it once · it only turns up when your Special 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 Twin Fault and Standing Quake. Take one and the rest are gone for the run.