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 Lyse Hext's second ability)
Though not as powerful as the others, this drop also comes with Damn (as Noctis's Death Magic), a card with some good utility as it can be either a single removal spell or a board wipe
This mono-white enchantment exiles permanents, and becomes a pillowfort piece, before a rather disappointing final chapter makes you potentially a total of
Keep Wasabi Methodical Engineer if you arent putting Hiram in, but otherwise drop him
As for the card, it's a copy of Akroma's Will, an instant that lets you choose between all your creatures gaining flying, vigilance, and double strike, or lifelink, indestructible, and protection from each color until the end of the turn