Mathmech Superfactorial (MYFI-EN012) [Mystic Fighters]

Target up to 3 "Mathmech" monsters in your GY with different names, then activate 1 of these effects;
<br>• Special Summon them, but their effects are negated, then, immediately after this effect resolves, Synchro Summon 1 "Mathmech" Synchro Monster using only those monsters, and shuffle the materials into the Deck instead of sending them to the GY.
<br>• Special Summon them, but their effects are negated, then, immediately after this effect resolves, Xyz Summon 1 "Mathmech" Xyz Monster using only those monsters.
<br>You can only activate 1 "Mathmech Superfactorial" per turn.