Puro, The Black Goo

First strike
Whenever Puro, The Black Goo deals damage to
a creature, put a latex counter on that creature.
Creatures with latex counters on them are latex
creatures in addition to their other types.
You and Puro, The Black Goo have protection
from latex creatures.
{p/b}, Remove a latex counter from a creature: Regenerate Puro, The Black Goo