Xyz Universe [PRIO-EN078] Rare Spell You can only use this

You can only use this effect of "Darklord Nasten" once per turn

You can only activate 1 "Last Chapter of the Noble Knights" per turn

Off-Road Grand Prix" once per turn

but it has its effects negated (if any)

Xyz Universe [PRIO-EN078] Rare Spell You can only use thisSet: Primal Origin Card type: Normal Trap Rarity: Rare Target 2 face up Xyz Monsters on the field; send both monsters to the Graveyard, then Special Summon 1 Xyz Monster from your Extra Deck, except a "Number" monster, whose Rank is equal to, or 1 less than, the combined original Ranks of those 2 Xyz Monsters, and if you do, attach this card to it as an Xyz Material. If you activate this card, your opponent takes no further damage this turn.