The strong mana in the format means most colors can splash for some kicker stuff but Green is the master of Domain and can get to domain 4 or 5 on turn 5 without too much work if it prioritizes it during the draft (those lands are going in the mid-picks)
In another exception, some planeswalkers can be used as your commander, but only if the card explicitly says this card can be your commander on it
This is a risk Im taking on because I just dont want to wait
Birgi, God of Storytelling is busted, Halvar, God of Battle is perfect for equipment decks, and Tergrid, God of Fright is on the Commander Game Changers list
Providing a ton of mana ramp in a colour that doesn't typically get much, this card can put you way ahead of the peloton.
However, they massively improve the quality of cards in your hand, and that makes them great contenders for your next blue deck