門道急行の事件 (Case of the Gateway Express) (ja)
Enchantment - Case
(CMC 2)
When this Case enters the battlefield, choose target creature you don't control. Each creature you control deals 1 damage to that creature.
To solve -- Three or more creatures attacked this turn. (If unsolved, solve at the beginning of your end step.)
Solved -- Creatures you control get +1/+0.