Grip of the Roil

two generic mana one blue mana Instant

Surge one generic mana one blue mana (You may cast this spell for its surge cost if you or a teammate has cast another spell this turn.)

Tap target creature. It doesn't untap during its controller's next untap step.

Draw a card.

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Showing Oath of the Gatewatch#56

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0.06 $

Foil 0.41 $

12 printings · up to 0.11 $

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Grip of the Roil rulings

2016-01-22
Grip of the Roil can target a creature that's already tapped. It still won't untap during its controller's next untap step.
2016-01-22
Grip of the Roil tracks the creature, but not its controller. If the creature changes controllers before its first controller's next untap step has come around, then it won't untap during its new controller's next untap step.
2016-01-22
For some cards, surge represents only an alternative cost, a discount that applies if you or a teammate has cast another spell this turn. Other cards, like Reckless Bushwhacker, have additional abilities or effects if you paid the surge cost to cast the spell.
2016-01-22
The other spell that you or a teammate cast can be one that's resolved, one that was countered, or (for instants with surge) one that's still on the stack.
2016-01-22
If an instant or sorcery spell cast for its surge cost is copied, the copy is also considered to have had its surge cost paid.
2016-01-22
Casting a spell for its surge cost doesn't change its mana cost or its mana value.

Grip of the Roil keyword rules

Surge Rule 702.117

Surge is a static ability that functions while the spell with surge is on the stack. “Surge [cost]” means “You may pay [cost] rather than pay this spell’s mana cost as you cast this spell if you or one of your teammates has cast another spell this turn.” Casting a spell for its surge cost follows the rules for paying alternative costs in rules and –h.