Number XX: Utopic Dark Infinity — Ruling

Effetto 1

This card's effect that Special Summons a monster from the Graveyard is a Trigger Effect. (Detaching 1 Xyz Material from this card is the cost to activate this effect.)
This effect can be activated optionally at the end of the Damage Step when either your monster or your opponent's monster is destroyed by battle and sent to the Graveyard. This effect targets 1 of the monsters in your Graveyard or your opponent's Graveyard that was destroyed by that battle.

This card's effect that increases your Life Points is an Ignition Effect.
This effect targets 1 other face-up Special Summoned monster in your Monster Zone.