Silent Stilettos [SAT010] (Silver Age: Usurp the Shadow Throne)

Whenever an attacking ally you control dies or an attack action card you control is destroyed by phantasm, you may pay [3 - Resources]. If you do, destroy this and gain 1 action point. Arcane Barrier 1 (If you would be dealt arcane damage, you may pay [1 - Resource] to prevent 1 of that damage.)