mtg personal card database Then and Now, Part 1 Shuffle your library Personal Incarnation | Magic 30th

Be King Undisputed (Epic) Pros : Universal answer

Usually, it's better to wait until we can cast him and several Auras on the same turn, to get immediate value out of him

2024-06-07 A spell cast using flashback will always be exiled afterward, whether it resolves, is countered, or leaves the stack in some other way.

Back in the day, it was Duneblast or Divine Reckoning, or maybe Slash the Ranks

Most of the time, Cumulative Upkeep costs are some amount of mana, though some cards (and this is especially prevalent during Coldsnap) would ask for some other payment such as paying life or sacrificing a creature

Even outside of Standard, Vivi Ornitier is great in Commander as well, both in the 99 and as a commander itself with cEDH playability