As reported earlier, Masumi’s Brilliant Fusion would be in the pack Clash of Rebellions, and it’s full effects are…?
You can only activate 1 “Brilliant Fusion” once per turn.
(1): When this card is activated, send Fusion Material Monsters listed on a “Gemknight” Fusion Monster Card from your Main Deck to the Graveyard, and Fusion Summon that Fusion Monster from your Extra Deck. Its ATK and DEF become 0. When this card leaves the Field, destroy that monster.
(2): Once per turn, you can discard 1 Spell Card. The Fusion Monster Special Summoned by this card’s effect gains ATK and DEF equal to its original ATK and DEF until the end of the opponent’s turn.