Juwalta Mage

{3}{g}{g}: Remove half of the poison counters from target player, rounded down.
{3}{w}{b}: Target player gains a Stasis counter
(Players with Stasis counters may not lose the game
for having less than 1 Life, and only untap one land
during their untap phase.).
Pay 5 Life: Play a blue or black instant spell from
your hand for free.