ask about card

can u tell me what card is which the effect is "all effect monster become a normal monster" or "all effect monsters effect r negated" or something like that..?

that ?

^yep that Skill Drain and maybe Curse of Anubis, I dunno about other cards.

Forbidden chalice works too, but it's only for one turn

Search up the Tyrant's cards, they are all traps designed to screw over effect monsters.

shadow and light absorbing mirrors work on Dark and lights in gy and field