The Venom Symbiote

Bestow (If you cast this card for its bestow cost, its an Aura spell with enchant creature. It becomes a creature
again if its not attached to a creature.)
Prevent all damage that would be dealt to Venom
and enchanted creature.
If a creature dealt damage by
enchanted creature would die, exile it instead.
Enchanted creature gets +X/+0, where X is the
number of creatures in exile.