Shift Condition : Z/X Overboost Lv 1 Shift Vessel : [Overboost] with "Grimoire Princess" in its card name [Always]<Valid> Square <Effect> Your opponent's non-Token Z/X that has original Cost of 3 or less cannot appear from anywhere except from Life. [Auto]<Valid> Square <Trigger> You Shift In to this card. <Effect> Make an "Eldritch Spawn" Token appear on Normal Square without Z/X in Reboot State. [Auto]<Valid> Square <Trigger> Your "Eldritch Spawn" is destroyed. <Effect> Choose up to one Z/X in your Trash, and return it to hand.