This doesn't seem too powerful with cards like Sliver Hivelord, but imagine getting 3 copies of Sliver Legion, or Predatory Sliver for an insane board-wide +3/+3
Two Fleur is usually not recommended, but in this specific case I think it is okay to run two in order to make full use of the three Ecclesia you would be playing
Black Kyurem ex 048/191 Loading
If their abilities are blocked or canceled out, Slifer and Ra are virtually helpless and while Obelisk is immune to card effects, spells, and traps, it can still be destroyed
Though this is undoubtedly a powerful effect, the fact that its tied specifically to Victini-EX does make it incredibly limited in scope
Were unsure about the price or how expensive these cards will be but expect to see them cost more than what youd pay for a meal at the fast-food chain