Team Galactic's Master Plan

At the beginning of your upkeep,
If you control Uxie, lake Guardian;
Mesprit, lake Guardian; and Azelf, lake Guardian
you may search your library for cards named
Dialga, Master of Time, and
Palkia, Lord of Space then place them onto the battlefield.
if you do, search your library for a card named
Giratina, lord of Distortion, and put it into your
hand. then exile Team Galactic's Mater Plan