In an aggressive deck, this is likely to be more than enough to kill them off - and that's not accounting for any extra creatures you may have, any ramping you've done or spare mana you've created
Mother Bear Costs bear mana to get out, and Mother Bear can cash itself in for two Bear tokens from your graveyard
Decks contain additional Foundations (FDN) cards and do not contain cards from Foundations Jumpstart (J25)
I wont go into extensive detail or complete depth of the entire format here, but you can find out everything there is to know by checking out Jason Klaczynskis blog, where he does an excellent job of explaining the format and its history
But these two are Bant counters creatures, and while they work really well together, I want to talk about their decks and what people are going to play
A New Way to Enjoy Pokmon TCG