If "Umi" is on the field: You can activate this effect; your WATER monsters can attack directly this turn. During your opponent's Battle Phase (Quick Effect): You can target 1 face-up monster your opponent controls; destroy it. If this card on the field is destroyed by battle or card effect: You can either add to your hand or Special Summon 1 WATER Warrior monster from your Deck or GY. You can only use each effect of "Mega Fortress Whale" once per turn.
| Printing | Rarity | 1st Edition | Unlimited | Actions |
|---|---|---|---|---|
LED9-EN016Legendary Duelists: Duels From the Deep | UR | 1st | Unl. |
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