Doesn't the attacker have to do like 10% damage in the attack for the refund to work? I thought I read that somewhere.I have 2 Refund artifacts, 1 artifact 20% on 2 lines & 1 artifact 22% on 2 lines. With Storage Blessing (25% or so) takes my total to 65% Refund. Its not the best but I'm happy with it.