Both the Sire and Koma seem very similar as seven-drop threats that are hard to remove and command specific answers
Initially, players focused on building decks for gameplay
are all very powerful archtypes in Nick's cube atm and that would be a very powerful option against them, but not a card that was really correct to maindeck enough to be auto include, hence a great sideboard card, but one that's flexible enough to get played enough to justify its slot unlike something like the Blasts or Chill or Boil etc
Bundles, which used to contain 10 Draft boosters, now instead contain eight Set boosters, meaning they can no longer be used for limited play and feature less cards, but will feature higher-value cards more regularly to make up for it
Re-introducing an old mechanic in an EDH deck will likely move the needle on one or two specific cards from a specific block, but have the good old days of the printing of Teysa Karlov making people realize Massacre Wurm is broken passed us by
In Commander, this card is going to make waves