Axl, Elf War Veteran

+1: Until end of turn, Axl, Elf War Veteran becomes a copy of target creature that's still a planeswalker.
-3: Destroy target artifact. If an artifact destroyed this way was attached to a creature, Axl, Elf War Veteran deals 5 damage to that creature.
-7: Axl, Elf War Veteran deals 10 damage divided among any number of targets. This damage cannot be prevented.