Worm Yagan [DT03-EN083] Common Sea Serpent and this card gains the

and this card gains the same effects as that monster

increase the ATK of the attacking monster by 1000 points during damage calculation only

change that Special Summoned monster(s) to face-down Defense Position

When this card declares an attack

If this Xyz Summoned card you control

Worm Yagan [DT03-EN083] Common Sea Serpent and this card gains theSet: Duel Terminal 3 Card type: Effect Monster Rarity: Common Attack: 1000 Defense: 1800 If the only monster you control is "Worm Xex", you can Special Summon this card from your Graveyard in face down Defense Position. If you do, remove it from play when it is removed from the field. When this card is flipped face up, select 1 face up monster your opponent controls, and return it to it's owner's hand.