Slenry, Scourge of Slikers

Trample
{b/g}{3} Monstrosity 5 - (If this creature isn't
monstrous, put five +1/+1 counters on it and
it becomes monstrous)
Other oozes you control have monstrosity X,
where X is the number of oozes you control.
The ability costs {1} for every ooze you control.