MKM-1 Case of the Shattered Pact

When this Case enters, 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.