Unstickerify [Un-Known Event Playtest Cards]

Enchant permanent
If enchanted permanent isn't a stickered playtest card, it can't attack or block.
If enchanted permanent is a stickered playtest card, treat it as the card beneath its sticker. If it's unclear without peeling the sticker, treat it as a Wastes. (Mystery Booster playtest cards count as stickered.)