Case of the Shattered Pact
Enchantment - Case
(CMC 2)
When this Case enters the battlefield, search your library for a basic land card, reveal it, put it into your hand, then shuffle.
To solve -- There are five colors among permanents you control. (If unsolved, solve at the beginning of your end step.)
Solved -- At the beginning of combat on your turn, target creature you control gains flying, double strike, and vigilance until end of turn.