In order to make time for writing I must give up working or gaming...
Flame Arrows says Reflex - All physical or magical damage dealt by a single ranged card becomes magical.
Bow card + hasty shot + Flame arrows...
How is the flame arrow NOT added to both cards instead of just one?
(Aimed Shot would do the same thing...)
"Hasty Shot" deals out its own damage (it just requires the Bow to be deployed as a sort of prerequisite for it to work). "Arcane Shot" is similar.
So "Flame Arrows G1 " turns the 2-3 damage from "Hasty Shot" into magical damage ("Arcane Shot" already does magical damage).
"Aimed Shot" is different. "Aimed Shot" triggers the Regular Action on a deployed Bow card. The Bow is a Ranged Weapon so, if you used "Aimed Shot", the Bow would fire for +2 damage and the damage would become magical because of the Reflex on "Flame Arrows G1 ".
Arcane Bow Mastery...
Does it boost Hasty Shot also? Hasty does not have the "bow" keyword...
No - "Hasty Shot" lacks the Bow keyword so "Arcane Bow Mastery F3 " won't buff it. The same applies to "Arcane Shot".
However, "Aimed Shot" triggers the Bow to fire and it's the Bow that deals the damage. So using "Aimed Shot" along with "Arcane Bow Mastery" would add +3 damage. "Flame Arrows G1 " would also make it magical damage and add a Burning Condition. Nasty.