Warden

As an additional cost , sacrifice three creatures.
Whenever a creature dies, Warden gains a skulk
counter.
{2}{b}{b} - Move a skulk counter to target creature
or planeswalker. They are under your control for
as long as they have a skulk counter.
{4}, {t} - Remove five skulk counters from anywhere
on your side of the battlefield. Search your deck or
graveyard for a permanent and place it onto the
battlefield. Activate this only as a sorcery.