The player may change any number of the targets, including all of them or none of them
Will there be a similar feeling associated with casting a Siege, knowing youll never have the resources to flip it
Silverbluff Bridge
Aethersquall Ancient Archipelagore Breaching Leviathan Charix, the Raging Isle Eater of Days Famished Worldsire Glacier Godmaw Grozoth Inkwell Leviathan Jokulmorder Kederekt Leviathan Kiora's Dambreaker Leviathan Nemesis of Reason Nimbus Swimmer Pearl Lake Ancient Segovian Leviathan Simic Sky Swallower Sin, Spira's Punishment Sin, Unending Cataclysm Sky Swallower Slinn Voda, the Rising Deep Starwinder Stormtide Leviathan Summon: Leviathan Thing from the Deep Trench Gorger Xyris, the Writhing Storm
Then you can activate Vivi once during your turn to generate some number of blue and/or red mana equal to Vivi's power, which should help you keep chaining spells together or cast a really big one
One classic fork: Blanket hate is powerful, but it hits everyone