Rebuttal

You choose the affected spell during Rebuttal's finalization, before opponents can react.^355.5359.3.c You do not decide whether to pay until Rebuttal resolves. The optional payment is not a cost paid to play Rebuttal; it is a game action Rebuttal instructs you to perform during resolution.^135.2.b.3205 Opponents therefore know which spell you chose, but not whether you will pay to gain control of it or decline and have Rebuttal attempt to counter it.

You may decline to make new choices and leave every existing choice unchanged, or remake every eligible choice the spell made.⁷⁵³ The eligible categories are play locations, modes, move destinations, and targets, all of which are choices normally made during finalization.^752752.1 Choices made "as you play this" and choices about optional additional costs cannot be remade.^752.2

If you make new choices, every resulting choice must be legal.^753.1 You cannot choose to make new choices unless a complete legal set is available.^753.2 You may select the same option again, but it still counts as remaking that choice.⁷⁵³ If the spell targets a game object after you remake its choices, that object's applicable targeting effects trigger, even if the spell targeted it before.⁷⁵⁴

If you decline, the existing choices remain unchanged even if a target has become illegal.^355.15 The spell still resolves, but an illegal target is unaffected.^{359.3.e.1359.3.e.5}

No. Restrictions already applied to a spell, including the targeting restriction imposed by [Hidden], also apply to its new choices.^753.3

Rebuttal allows you to remake a finalized spell's targets,^752.1 but every new target must still be legal.^753.1 When a spell is played from face down, its targets must be chosen from among the options at the battlefield where it was hidden unless the spell's own targeting restriction makes that impossible.^811.1.d.2 Changing the spell's controller does not change where it was played from, so this restriction continues to apply.

Under the August 2026 Vendetta FAQ, if the spell resolves after Rebuttal takes control of it, the spell's new controller's applicable "when you play a spell" abilities trigger; the original player's abilities do not. These abilities trigger once the spell has finished resolving.^420.4.a Rebuttal has made the player who gained control of the spell its controller by then.