When do you declare targets for spells and abilities in Riftbound - at cast or at resolution?

Ruling: You declare targets when you put the spell or ability on the chain, not when it resolves.

Nuances:

• Any effect that asks you to choose an object on the board (in any wording) requires a target
• Cards like "Deal 3 to a unit" and "Choose an enemy unit" both use the same targeting timing despite different wording
• If a target becomes invalid before the spell resolves (e.g., a unit is retreated from the battlefield), the spell does not affect that target