Simic Aggro deck based around explosive evolve growth:
T1 Cloudfin Raptor
T2 Young Wolf into Rapid Hybridization leaves a 3/4 flyer, a 2/2 and a 3/3.
My favourite aspect is the decks ability to adapt unlike most other aggro decks, Zameck Guildmage keeps undying creatures alive while generating card advantage, which also allows ETB triggers for evolving creatures.
As the game progresses, Master Biomancer with Rancor and Vorapede will give some staying power and can overpower midrange decks while Elusive Krasis can push through damage on a stalled board.