If you were playing fair, there was no way you could compete with that if the deck pulled it off and many games were won simply due to a willingness to play a card this powerful, allowing such decks to win long games they would otherwise be lost in
Since they dont use a colored mana symbol, they can go into any Commander deck to provide an off-color basic land type, which could be interesting for domain or converge strategies outside 5-color shells
The in and out loop of populating, sacrificing, and creating tokens and counters with Xavier bridges the gap between tons of mechanics populate, evolve, proliferate, and even delve cards see play alongside Xavier as this commander fills the graveyard with sacrificed creatures
It dates back to the early days of the franchise
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