SCP-106, The Old Man

Infect (This creature deals damage to creatures in the
form of -1/-1 counters and to players in the form of
poison counters.)
{3}{t} : Any creatures that took damage this turn
gets X -1/-1 counters, where X was the amount
of damage taken.
when this creature leaves the battlefield, Search
your library for a land card then put it into play
tapped. Shuffle your library afterwards.