Ratatoskr, Keeper of Yggdrasil

{w}{u}{b}{r}{g}, Exile one god card from your graveyard, Ratatoskr Keeper of Yggdrasil
gains all abilities of that card until the start
of your next upkeep. You may only activate this ability once per turn.
{x}, Choose a color. Your devotion to the chosen color becomes X until the start of
your next upkeep.