The life loss is probably worth that extra card per turn, or you can turn it into even more of an advantage by slotting a Vilis, Broker of Blood
Temple of the False God only works in the late game, but there are chances of you obtaining it before you get to the five lands
Im very excited to write about this because Innistrad has always been my favorite plane
(2025-06-06) 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)
It doesnt have Skullclamps ability to kill its host without help, and it only draws one card instead of two, but Skullclamp is a broken card and shouldnt be considered a baseline for measuring the value of anything