This decks biggest weakness is control: a little countermagic or a sweeper to break up the synergies is enough to keep Tokens from pressuring Teferi in game one
Its not locked into a specific color, so it slots right into any typal deck with no trouble
As Commander is a format rife with mana rocks and utility artifacts, this single card can most often provide its caster with enough mana to run away with a game, whether it's played in the early or late stages of a Commander game
The green in the hybrid mana symbol means you cant pack this into your Brago, King Eternal decks, but it also means Emiel slots easily into Selesnya counters decks on top of all the decks that just want a flicker effect like Bruse Tarl, Boorish Herder and a partner like Thrasios, Triton Hero
This guide will shed some light on the mysteries behind card bannings
I mean, if you are tutoring for cards, you could make it happen in a lot more games