Yawgmoth, Thran Physician

Protection from Humans
Pay 1 life, Sacrifice another creature: Put a -1/-1 counter on up to one target creature and draw a card.
{b}{b}, Discard a card: Proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
"Genetic enhancement is not enough. Sometimes, more drastic measures are necessary. Sometimes,
the gene pool demands to be thinned."