Sea Stealth Attack [LEDU-EN018] Rare Token Monster or sent from the field

or sent from the field to the GY: You can Special Summon 1 “Thunder Dragon” monster from your Deck in Defense Position

Negate all monster effects that activate in the GY

each player rolls a six-sided die twice

or 1 "Change" Quick-Play Spell Card in your GY

Sea Stealth Attack [LEDU-EN018] Rare Token Monster or sent from the fieldSet: Legendary Duelists Card type: Continuous Trap Rarity: Rare When this card is activated: You can activate 1 "Umi" from your hand or GY. While "Umi" is on the field, this face up card gains these effects. Once per turn: You can banish 1 WATER monster you control until the End Phase; this turn, face up Spells Traps you control cannot be destroyed by your opponent's card effects (even if this card leaves the field). At the start of the Damage Step,