Yawgmoth, the Ineffable

Deathtouch
Whenever another creature dies, if had no -1/-1 counters, put a -1/-1 counter on all other creatures and remove a loyalty counter from all planeswalkers.
{b}{b}{b}{b}, Pay 4 life, {t}: Gain control of target creature or planeswalker. Sacrifice it at the beginning of the next end step.