Sir Hammerlock, Hunter

When Sir Hammerlock, Hunter enters the
battlefield and whenever a creature with a -1/-1
counter dies, put a -1/-1 counter on up to one
target creature with toughness 2 or greater.
{t}, {b/g}{b/g}: Put a -1/-1 counter on target creature
or remove one from it. If you removed a counter
this way, you may search your library for a basic
land card, put that card onto the battlefield
tapped, then shuffle.