Uni-Horned Familiar [DREV-EN009] Common Normal Spell after damage calculation you can

after damage calculation you can remove from play that monster and this card

if face-down)

IF this card has "Number 105: Battlin' Boxer Star Cestus" as an Xyz Material

if a face-up "Nekroz" or "Zefra" card(s)

Set: OTS Tournament Pack 1 Card type: Fusion/Effect Monster Rarity: Ultimate Rare Attack: 2400 Defense: 1800 Must be Special Summoned with "Mask Change" and cannot be Special Summoned by other ways

Uni-Horned Familiar [DREV-EN009] Common Normal Spell after damage calculation you canSet: Duelist Revolution Card type: Tuner Monster Rarity: Common Attack: 0 Defense: 1000 When this face up Defense Position card is selected as an attack target, you can remove from play 1 monster you control other than this card to remove this card from play. The attacking monster must attack. During your next Standby Phase, if this card was removed from play by this effect, this card returns to the field.