Case of the Uneaten Feast

   Enchantment — Case

Whenever a creature you control enters, you gain 1 life.
To solve — You've gained 5 or more life this turn. (If unsolved, solve at the beginning of your end step.)
Solved — Sacrifice this Case; Creature cards in your graveyard gain "You may cast this card from your graveyard" until end of turn.

Illustrated by Titus Lunter