Cracked Skull is a common Enchantment — Aura card from Duskmourn: House of Horror (DSK), collector number 88. Current market price: $0.14 (foil $0.21), TCGplayer market prices via Scryfall.
Enchant creature When this Aura enters, look at target player's hand. You may choose a nonland card from it. That player discards that card. When enchanted creature is dealt damage, destroy it.