2021-04-16 : Each copy will resolve one at a time. As each copy resolves, if you discarded a nonland card, the reflexive triggered ability triggers and you pick a target to be dealt damage. That ability will resolve before you deal with the next copy of Fiery Encore.

2021-04-16 : Each copy you create because of storm will cause your magecraft abilities to trigger.

2021-04-16 : If you have no cards in hand as Fiery Encore resolves, you won’t be able to discard a card, but you will draw a card. No damage will be dealt.