The process of acquiring the sword is considered one of the worst side quests in the series, but the raw power it provides does balance it out somewhat
Generally speaking, you'll only be able to make three creatures at most, likely two in most cases
That is: The First Chapter (1), Rise of the Floodborn (2), Into the Inklands (3), and Ursulas Return (4)
Opening Ceremony (UNF-404) - Unfinity Foil Opening Ceremony (UNF-404) - Unfinity Foil Wizards of the Coast This item is like new, pulled from a sealed pack
Back Sephiroth, One-Winged Angel Legendary Creature - Angel Nightmare Avatar Flying Super Nova - As this creature transforms into Sephiroth, One-Winged Angel, you get an emblem with "Whenever a creature dies, target opponent loses 1 life and you gain 1 life." Whenever Sephiroth attacks, you may sacrifice any number of other creatures