Caldron Pool

Caldron Pool enters tapped unless you control
the fewest lands.
{t}: Add {u} or {r}.
{u/r}, {t}: Create a legendary 1/1 blue and red Ape creature token named "Shift, Mouth of Tashlan"
with "If this creature deals combat damage to a
player, take control of one of their creatures
until the beginning of your next upkeep. It gains
haste as long as you control it."