If one of the targets is no longer on the battlefield when a spell that requires both targets to be on the same battlefield resolves, does the spell still affect the remaining target?

Ruling: No, the spell does not affect the remaining target. If a spell specifies that targets must be on the "same battlefield," both units must be present at resolution for the spell to have any effect.

Sequence:

• When the spell is played, both targets must be on the same battlefield to enter the chain
• At resolution, both targets must still be on the same battlefield
• If one target is no longer present, the spell has no effect on the remaining target

Nuances:

• Riftbound does not have "fizzling" as a mechanic, but spells with "same battlefield" requirements still fail to resolve if the condition is not met
• The key distinction is the "same battlefield" text on the card, which creates an ongoing requirement at resolution