In blue Commander decks led by Tamiyo, Inquisitive Student or Emry, Lurker of the Loch, that control works perfectly since those decks usually just want time to set up their own game plan instead of dealing with every single threat directly
It seems very unlikely that the consistency you lose from playing 20 extra cards will decrease your odds of winning by 10% or more, which would mean even discounting any specific Yorion, Sky Nomad synergy, it would be correct for a lot of decks to add some extra cards to meet the Bird Serpent's companion restriction
Capable of dishing out four damage optionally split between multiple targets, Fury would be decent removal when played on curve
Mana fixing is readily available in green, which lets us take powerful cards and throw them in our decks
1 Traditional foil spiderweb basic land 1 Traditional foil default frame rare or mythic rare There are 53 rares (77.9%) and 15 mythic rares (11%) from SPM that can appear in this slot