When does a spellcaster pick their target for a spell? If a spell takes a while to cast, do they pick a target at the beginning, and then the target has to stay in range, or are they free to pick any target in range when the spell finishes casting?
As a concrete example, if I am ritual casting Identify, that takes 11 minutes. If a party member is coming with a magic item, can I begin ritual casting before they arrive, and then finish the ritual and target their item once they arrive, or do I need to wait until my party member brings me the item and then ritual cast Identify with it next to me the whole time.
HOWEVER. For Identify, specifically, the spell clearly states "Target: One object that you must touch throughout the casting of the spell" as the previous commenter noted.
Either way, these have been answered elsewhere.
– Σ of eDπ Apr 25 '22 at 07:23