Thorn Ward is a legendary major card out of the New mechanic pool. Ward Pulse's ward reflects 30% of every hit taken back at the striker; the ward is 80%.

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 Great Ward and Chorus Ward. Take one and the rest are gone for the run.