P'tarix & Xirat'p

You can't cast non-enchantment permanent spells.

{w}{w}{u}{u}{b}{b}{r}{r}{g}{g}: All spells you cast this turn, while P'tarix & Xirat'p are on the battlefield, have "Cascade, Cascade" and until your next upkeep whenever an opponent casts an enchantment, instant or sorcery, roll a six-sided dice.
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1-2 - Nothing happens
3-4 - Counter that spell
5-6 - Copy the spell then, Counter that spell. You may cast the copy during your next