it's not possible to cast the copy as a permanent
Finally, at some point we noticed that the only double-red cards in the deck were two copies of Chandra, Dressed to Kill in the sideboard, which were somewhat underwhelming anyway, so we cut them for Jegantha, the Wellspring
However, Tapu Koko isn't going to be having anything on it when using the Ability, meaning it gets to use it basically for free.
The life gain happens simultaneously with the damage being dealt
Quality Output: Enjoy high-quality card designs that look and feel just like the real thing
Its not always the best choice, but has occasionally seen some play as a card that can wipe away pesky boss monsters and slow down your opponents strategies at crucial moments