i mean as long as its ALSO prismatic it would break the number prismatics i have... as so far 4 of my 8 prismatics are FUSIONS that are not good OR hard to summon or needs me to level a person up to 40 to make it runable :(
I'd have expected Anniversary Art BEWD and/or DM, but this implies it's something new. I don't know if Slifer's likely. I feel like that's more likely to be an event reward down the line like Ra. (Either Battle City part 2, or a Yugi event.) Not sure what I expect it to actually be personally. Maybe something like Brain Control or Monster Reborn?