Yangchen, the Sought Regulator

Avatar state — If you control two or more Avatars,
choose one of them, and the rest are put into their
owners' graveyards. At the beginning of your upkeep,
you may pay {w}{u}{b}{r}{g}. If you do, until end of
turn, Yangchen, the Sought Regulator has all
activated abilities from all Avatar creatures in your graveyard.
{3}{g}{g/w}{w},{t}: Creatures you control gain lifelink
and reach until end of turn.