If your opponent activates a monster effect on the field (except during the Damage Step), or when their monster declares an attack, and "Umi" or a card that mentions "Dark Time Wizard" other than "Fisherman of Legend" is on the field: You can Special Summon this card from your hand.

If this card is Special Summoned: You can target 1 monster your opponent controls; destroy it, also return this card from the field to the hand during the End Phase of this turn.