If it hits, it's a card that thins down your deck and sometimes offers the utility of even choosing between multiple attack cards for the most relevant one. Otherwise you've just wasted a resource that could have paid for another card. Not sure I'd trust always hitting an attack event when looking at just 4 cards, but for a hero that is happy to swap into AE form fairly often (She-Hulk, Ms Marvel, Groot) it seems like a good effect for 0.