The non-enchantment clause is odd but is probably intended to stop coeurl being an easy answer to the sets new Saga Summon creatures
Not bad for a common from Prophecy
(6/6/2025) To determine the total cost of a spell, start with the mana cost or alternative cost you're paying (such as a flashback cost), add any cost increases (such as kicker costs), then apply any cost reductions (such as that of The Fire Crystal's first ability)
For now though, it seems like all four are worth checking out
She doesn't fit in with the rest of the family, as nothing else can quest after her, but she's an excellent way to claw things back in a pinch
It has an errata confirming the correction, so any character can be chosen, not just the opponents