It might be good with Greninja/Cyrus shenanigans, though, to pick apart the opponents board and make it difficult for them to break through
The three keywords were added to help the feel that all the colors were part of the card
The second reason is that Old School players actually care about Preacher to steal creatures from their opponents and sacrifice them to stuff like Diamond Valley or Ashnods Altar
Compared to other extra-turn sorceries like Time Warp and Alrund's Epiphany, Temporal Mastery's miracle cost can provide you with an early game advantage at a converted mana cost of just two mana
Finally, from the bonus sheet, Sivitri, Dragon Master is a Blue/Black commander that is most popular as a Dragon commander
It comes with a considerable cost, however, requiring five mana in total to cast, but this hasn't stopped it from becoming a popular card in Commander, which is why it's holding decent value since the launch of Takir: Dragonstorm