Numbers Eveil (Ultra Rare)

If your opponent controls a monster(s) Special Summoned from the Extra Deck and you do not: Choose 4 Number Xyz Monsters from your Extra Deck with different Ranks, plus a 5th Number Xyz Monster whose Number value in its name equals the combined Number values of the 4 other monsters, Special Summon that 5th Number monster (this is treated as an Xyz Summon), and attach the 4 chosen monsters to it as material, but you cannot Special Summon monsters, except Number Xyz Monsters, while you control that face-up monster.