Zubababa Knight (DUAD-EN001) [Duelist's Advance]

If this card is Normal or Special Summoned: You can activate 1 of these effects;<br>• Add 1 "Zubaba" monster from your Deck to your hand, except "Zubababa Knight". This card's Level becomes that added monster's Level.<br>• Destroy 1 Level 4 or lower Defense Position monster your opponent controls.<br>If this card is detached from an Xyz Monster to activate that monster's effect: You can add 1 "Gagaga" monster from your Deck to your hand. You can only use each effect of "Zubababa Knight" once per turn.