I think maybe just reframing it could be better. Like, instead of "Yay, you get this good thing! (but secretly it is bad)" you could do "Oh no, a fairy added a card to your deck! (but secretly it may be fine)". Also adding the card altars means this game has *so much* card destruction, so leaving it as is is probably also fine since any cards you don't want you can toss at a shop or altar anyway and you're never gonna use up all the sacrifices anyhow.