Exosister Returnia - 25th Anniversary Tin: Dueling Heroes Mega Pack (MP23)

If all monsters you control are "Exosister" monsters (min. 1): Pay 800 LP, then target 1 card your opponent controls or in their GY; banish it, then you can apply 1 of the following effects.
• Immediately after this effect resolves, Xyz Summon 1 "Exosister" Xyz Monster using monsters you control.
• If you Xyz Summoned this turn, banish 1 card your opponent controls. You can only activate 1 "Exosister Returnia" per turn.