Yoki, Trickster Titan

Your creatures gain: "{t} add 1 mana of any color.
This mana can only be used to cast instants, sorceries, or creature abilities".
{2}{u}: Tap untapped permanent. It does not
untap during its controllers next untap phase.
{2}{g}: Untap a tapped creature. That creature
gains Deathtouch until end of turn.
{2}{w}: Target creature gets +3/+2 and
vigilance until end of turn.