Reiner, Underworld Bowman

Discard a card, {2}{g}: Put a -1/-1 counter on
target creature, then proliferate.
Discard a card, {b}{b}{t}: Activated abilities of
creatures with -1/-1 counters them can't be
activated for the rest of the turn
Whenever a creature you control with a
-1/-1 counter on it dies, draw a card and
each opponent discards a card.