If you have no cards in hand, you still exile three cards while resolving Chandra's first ability and you may play them this turn.
2020-06-23
You must follow the normal timing permissions and restrictions for the exiled cards for Chandra's first and last abilities. If one is a land, you can't play it unless you have land plays available.
2020-06-23
You'll still pay all costs for a spell cast this way, including additional costs. You may also pay alternative costs if any are available.
2020-06-23
If you don't play the exiled cards, they remain exiled.
2020-06-23
Because it's a loyalty ability, Chandra's last ability isn't a mana ability. It can be activated only any time you could cast a sorcery. It uses the stack and can be responded to.
+1: Discard your hand, then exile the top three cards of your library. Until end of turn, you may play cards exiled this way.
−9: Search your graveyard and library for any number of red instant and/or sorcery cards, exile them, then shuffle. You may cast them this turn. Add six .
