Wall of the Abyssal Maze

Defender (This creature can't attack.)
Whenever one or more creatures attack, you may
pay {x}{u}{u}, where X is equal to the number of enchantments you control. If you do, attacking creatures get -X/-0 until end of combat.
If an attacking creature would deal combat
damage to a player, its controller may sacrifice it instead. If they do, they draw two cards.