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Root Water
An amphibian capable of calling up a massive tidal wave from the dark seas to wipe out enemy monsters.

Rope of Life
When a monster(s) is destroyed by battle and sent to your GY: Discard your entire hand (min.1), then target 1 of those monsters; Special Summon it, and if you do, it gains 800 ATK.

Roulette Barrel
Once per turn: You can roll a six-sided die twice, choose 1 result, and destroy 1 monster on the field whose Level is equal to that result.

Royal Command
Flip monsters' effects cannot be activated, also their effects are negated.

Royal Decree
Negate all other Trap effects on the field.

Royal Keeper
Once per turn, you can flip this card into face-down Defense Position. When this card is flipped face-up, it gains 300 ATK and DEF until the end of the turn. (If attacked, this effect resolves after damage calculation.)

Royal Magical Library
Each time a Spell Card is activated, place 1 Spell Counter on this card when that Spell resolves (max. 3). You can remove 3 Spell Counters from this card; draw 1 card.

Royal Oppression
Either player can pay 800 Life Points to negate the Special Summon of a monster(s), and/or an effect that Special Summons a monster(s), and destroy those cards.

Royal Surrender
Activate only when your opponent activates a Continuous Trap Card. Negate the activation and the effect of the card and destroy it.

Royal Tribute
If you control "Necrovalley": Both players discard any monsters in their hands.