Its a great card, but this deck might not be the best fit for it
Somehow, the much easier to use Winter Orb is wedged into the #2 slot between two much more restrictive options
Sultai Towns: This can either be UG or GB base, and often splashes, with some graveyard synergies in the heavier black versions
P/T Number 469 Language English Legal Formats Brawl, Commander, Competitive Brawl, Historic, Legacy, Modern, Timeless, Vintage Not Legal Formats Alchemy, Pauper, Pioneer, Standard Rulings (6/6/2025) "Flashback [cost]" means "You may cast this card from your graveyard if the resulting spell is an instant or sorcery spell by paying [cost] rather than paying its mana cost" and "If the flashback cost was paid, exile this card instead of putting it anywhere else any time it would leave the stack." (6/6/2025) You must still follow any timing restrictions and permissions, including those based on the card's type
Once at least four creatures have died, you don't ever even need to play Sephiroth, as every death will drain an opponent for one life
Hopefully this will be the last year I have to do two lists to properly communicate the feel and historical significance of the year