Whether you are utilizing the additional combat step to your advantage, activating Planeswalkers again, or simply utilizing the big mana advantage you get by untapping your lands, Time Walk does everything you could want
Still, since those kinds of strategies have always been fringe at best, Im wondering whether Sephiroth might finally push them into real viability or if its just another intriguing piece of an unsolved puzzle
Serialized Golden Chocobo and Colorful Chocobo Cards Digital render
It's a consistent source of land and tokens whose self-mill strategies synergize with a variety of decks
Also, for an additional cost of one of each mana type, you may untap all attacking creatures, giving them trample, lifelink, and haste until the end of the turn, and trigger another combat phase