Madolche Cruffssant

The monster effect "When this card is destroyed by an opponent's card and sent to the Graveyard: Shuffle this card into the Deck" is a Trigger Effect that activates in the Graveyard. (It does not target. It is a mandatory effect that activates if "Madolche Cruffssant" itself is destroyed by an opponent's monster in battle or by an opponent's card effect and sent to the Graveyard. It also activates during the Damage Step.)

The monster effect "Once per turn: You can target 1 other 'Madolche' card you control; return that target to the hand, and if you do, increase this card's Level by 1 and gain 300 ATK" is an Ignition Effect that activates on the field. (It targets 1 face-up "Madolche" card you control, other than "Madolche Cruffssant".)

The action of "return that target to the hand" and the action of "increase this card's Level by 1 and gain 300 ATK" are considered to occur simultaneously.