Also, could you clarify if it gains HP every turn for "token groups of three" that generated Max HP last turn? I.e. - if the tokens remain and are not "traded in" to gain the Max HP it could be quite powerful, perhaps overly powerful.
Oops, this is basically the same thing art-y asked, above.
Is your response intending that if you play one of these along with an Adrenaline + Frog combo, it will generate 4 tokens. Turn ends and player gains 1 Max HP. Next turn, AdrenaFrog attacks and generates four more tokens, now a total of 8 tokens exist with max HP at 101. Turn ends and player gains 2 max HP = 103 total HP. Next turn, another Frog + Adrena so ending the turn is 8 tokens + 4 for each frog (x2) for 16 tokens. Max HP goes from 103 to 108. Is this how you intend the mechanic to function?