Chandra, the Firebrand

When the delayed trigger resolves, it creates a copy of a spell. You control the copy. That copy is created on the stack, so it's not "cast." Abilities that trigger when a player casts a spell won't trigger. The copy will then resolve like a normal spell, after players get a chance to cast spells and activate abilities.

The copy will have the same targets as the spell it's copying unless you choose new ones. You may change any number of the targets, including all of them or none of them. If, for one of the targets, you can't choose a new legal target, then it remains unchanged (even if the current target is illegal).

When you activate Chandra's last ability, you choose up to six target creatures and/or players. No damage is divided, and Chandra can't deal more than 6 damage to any one target. Chandra deals 6 damage to each target that is still legal when the ability resolves.