Mobius the Mega Monarch [LVAL-EN040] Secret Rare OTS Tournament Pack 1 You can only use each

You can only use each effect of "Duoterion" once per turn

when a card or effect is activated that targets this card (except during the Damage Step): You can negate that effect

except "Prank-Kids" monsters

Set: Secrets of Eternity Card type: Normal Trap Rarity: Common When an opponent's monster declares an attack while you control an Attack Position monster(s): Change all monsters you control to Defense Position

Set: Battle Pack 3: Monster League Card type: Effect Monster Rarity: Rare Attack: 1700 Defense: 1000 You can Tribute 1 other Fish-Type monster

Mobius the Mega Monarch [LVAL-EN040] Secret Rare OTS Tournament Pack 1 You can only use eachSet: Legacy of the Valiant Card type: Effect Monster Rarity: Secret Rare Attack: 2800 Defense: 1000 You can Tribute Summon this card by Tributing 1 Tribute Summoned monster. When this card is Tribute Summoned: You can target up to 3 Spell Trap Cards on the field; destroy those targets. If this card was Tribute Summoned by Tributing a WATER monster, add this additional effect. Your opponent cannot activate the targeted card(s) in response to this