Wow! Instant and playable in Blue OR Green?

Really big merfolk is what I see in this card. Assemble a horde of little green or blue guys and just watch them explode! Like those old commercials for the little sponge creatures that grow with added water and you keep as pets (80’s represent).

The Instant on this card is what makes it awesome. As opposed to Overrun, this is an actual combat trick. Probably more in limited where you attack with a bunch of your little guys to seemingly just poke a tiny bit of damage through. Your opponent will either block your little guys or let them through, either way it’s a losing proposition if you have this in hand with a decent amount of mana on the battlefield.

These creatures look somewaht smaller than the ones on Biomass Mutation, no?

Think of the insane possibilities with Elf decks packing Elvish Archdruid or Priest of Titania. Make a ton of mana with your one elf then swing in with the rest of your army. In Commander, where matches usually last really long, this can be a great finisher with even only 3 creatures in play. It also does wonders with creatures like Needle Specter or Cold-Eyed Selkie which get you a better benefit when they grow.