Thanos, The Mad Titan

Trample, vigilance, mentor, convoke
{t} If Thanos, The Mad Titan has a power and toughness less than 10, put a +1/+1 counter on
this card.
{x}{b/r}{p/b}{p/r} Add {c}{c}. Each opponent exiles X
cards.
{10}{b/r}{p/r}{p/b} Each opponent exiles half of their
cards of your choice. Then exile this card.