yal do know mods can refund previous attacks played too right?Its worth it to refund two powerful cards that you can use next turn though. You could get two valuable hero cards back
Using an empower with Nico for example, and refunding it so you can use that next turn and have 3 turns left that cost zero heroism to cast
Edit-
Its also gives 50%+ attacks to redrawn cards so if one of them was a heroic card its even more powerful. Its a great skill