Grandpa Demetto — Ruling

Effetto 1

This card's effect that Special Summons up to 2 Normal Monsters with 0 ATK or DEF from your Graveyard is an Ignition Effect that can be activated on the field. (This effect does not target. You choose which monsters are Special Summoned when the effect resolves. Detaching 1 Xyz Material from a Princess Cologne you control is the cost to activate this effect.)

This card's effect that destroys an opponent's monster and inflicts damage to your opponent is a Trigger Effect that can be activated on the field. (This effect targets 1 Xyz Monster you control that activated its effect, and 1 monster your opponent controls. It cannot be activated during the Damage Step.)
This effect can be activated in a new Chain after resolving the effect of the Xyz Monster that was activated by detaching a Normal Monster.
When resolving this effect, destroy the opponent's targeted monster, and inflict damage to your opponent equal to your Xyz Monster's Rank × 300. (These actions occur simultaneously.)