Ka'raxa, Eternal Wrath

Indestructible, deathtouch, toxic 3
Harbinger of Doom- At the beginning of your upkeep if an opponent has 2 toxic counters
they must mill X amount of cards from their library. (X being the equivalent to toxic counters).
{2}{u/b}•Consuming Flames- Sacrifice X amount of creatures you control and for each creature sacrificed Ka'raxa gains one +1/+1 counter.
-Partner