This sort of deck is exciting because typically Rakdos doesnt get ramp quite like this, but thanks to treasure now being available to all 5 colours we can see a Rakdos treasure deck starting to take shape and that seems pretty exciting
Simple yet incredibly effective, within the context of a hydra deck, as hydras are most often composed of +1/+1 counters, Branching Evolution can allow a player's creatures to enter the battlefield twice as large as they would otherwise.
There were four surprisingly strong legendary Frogs in the set and countless nonlegendary Frogs that could help round out the list
Cards like Regal Bunnicorn, Hardened Scales, and Valley Questcaller make 10 power pretty easy to achieve
Turn it face up any time for its mana cost if it's a creature card.) Whenever you turn a permanent face up, put a +1/+1 counter on it
It's very strong in life gain and metagames with going wide brews like Aggro and Tokens that can easily make a ton of life for any deck's archetype that shares White
