Ghostrick Yeti [AC18-EN004] Super Rare Thunder You can only use this

You can only use this effect of "Impcantation Inception" once per turn

When this card inflicts battle damage to your opponent: You can target 1 card your opponent controls

treat it as Level 6

also they have their effects negated

Ghostrick Yeti [AC18-EN004] Super Rare Thunder You can only use thisSet: Advent Calendar 2018 Card type: Effect Monster Rarity: Super Rare Attack: 300 Defense: 2000 Can not be Normal Summoned , unless you control a " Ghostrick " monster . Once per turn : You can change this card to face down Defense Position . When this card is flipped face up : You can target 1 "Ghostrick" monster on the field ; this turn , it can not be destroyed by battle or card effects.