ZS - Armed Sage
If the only monster you control is 1 Level 4 monster not named "ZS - Armed Sage", you can Special Summon this card (from your hand). A "Utopia" Xyz Monster that was Summoned using this card on the field as material gains this effect.
● If this card is Xyz Summoned: You can add 1 "ZW -" monster from your Deck to your hand.
You can only use this effect of "ZS - Armed Sage" once per turn.