I'd either nominate this for Mythic candidacy or tone down that final ability to only trigger on Swarming Ooze's attack. Exponential growth is always scary as all hell.

Mythic rare, triple , and "tapped and attacking." Awesome mode activated. Having it get +1/+1 may be overkill.

Dude1818, can you clarify the "tapped and attacking"?

I can see this going mythic; swap with Mycolisk?

"Whenever an ooze you control attacks, put a 1/1 green ooze token onto the battlefield tapped and attacking."

Wow. That's pretty daring. And cool. I think it would lead a lot of people into thinking it made infinite tokens on a single swing though.

Not bad though, apart from that.

Upped to Mythic. Cost adjusted to to match costing of the other four mono-mythical in the set. P/T bumped to 2/2 to offset extra in cost.

Reminiscent of Spawnwrithe, in that you need to deal with it on the first attack or else it'll grow out of control. Which is completely fine on a mythic.

It does have some pretty big weak spots; nearly any black removal or a two point Earthquake will kill it.