If the deaths stack, this is OP.
However, if it stored deaths from the last turn... Hm...
Not sure what you mean here, what happens is:
Turn X: You play mother bear + 4 frogs
Opponent's Turn X: He plays rain of fire, kills all 4 frogs
Turn X+1: You play another frog, mother bear attacks 5 times
Opponent's turn X+1: Opponent does not kill frog
Turn X+2: Mother Bear attacks once
Couldn't this make for a possibly OP combo w/ ball lightnings?
18 Life towers
6 Ball Lightnings
6 of these
Life mark
Wouldn't make for too bad a deck.
There are faster rush decks out there, even mono (USEM seems like it would outspeed this)
But upon second glance, this looks OP now. I'm thinking of dropping the stats to 4/5|5/6, since right now I'm valuing the ability at 1, which definitely seems too little. Thoughts?