Heretical Phobos Covos

[ Illusion / Xyz / Effect ] 2 Level 4 monsters You can target 1 Effect Monster your opponent controls; negate its effects, then, if it battled this turn, you can take control of it until the End Phase. This is a Quick Effect if this card has an Illusion monster as material. You can only use this effect of "Heretical Phobos Covos" once per turn. If this card battles a monster, neither can be destroyed by that battle. ATK/ 2100 DEF/ 1500