Gelatinous Cube

When Gelatinous Cube blocks or becomes
blocked by a creature put a slime counter on that creature.
When a creature has 3 or more slime counters on
it, it gains Defender
When a creature has 6 or more slime counters on
it, its controller sacrifices it, you gain life equal to
its toughness.
"Don't lets its apparent lethargy deceive you, this
thing is as predatory as any jungle beast." -Skeeg Gravelhop