Hydra Pup

Trample
{x}{x}{g}: Monstrosity X (If this permanent
isn't monstrous, put X +1/+1 counters on it and
it becomes monstrous.)
As long as Hydra Pup is monstrous, it can block an additional creature each combat.
"Ooh, aren't you the cutest."
- zoology student's last words