Chain Overload is a legendary major card out of the New mechanic pool. Overload bursts twice: the second pulse 0.3 s later spends no Conduit; cooldown 10% longer.

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 Grounded Arc and Focused Overload. Take one and the rest are gone for the run.