Can be tricky to use; don't flood your deck with copies of this to a point where it can't draw damage anymore. My favorite run with Undeath applied Retain to it, which meant I could hold a bunch of them in my hand to use whenever the other cards I drew weren't enough to Block that turn.
Very useful self-duplicating block. This is an especially good card for Enchantments that have a one-time effect as the copy is created before the Enchantment is consumed on the original.
