Exosister Returnia (POTE-EN076) [Power of the Elements]

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.
<br>• Immediately after this effect resolves, Xyz Summon 1 "Exosister" Xyz Monster using monsters you control.
<br>• If you Xyz Summoned this turn, banish 1 card your opponent controls.
You can only activate 1 "Exosister Returnia" per turn.