Wolves/Carcass is interesting, I appreciate the synergies between the cards.
Wolves: Even though the discard attack doesn't stack, it is likely too powerful at $5. Opening with this and playing it before your opponents have multiple actions in hand will likely kill their turns. Donald X. said Raider at $5 was oppressive, and it has a similar-but-milder attack (I know you're not a Nocturne fan, but the design principle holds). The Carcasses help feed the Wolves, but until someone plays two Wolves in one turn, you don't have any, and are discarding e.g. the Wolves you got to try to fight back.
Carcass: This seems harsh overall. I don't think it needs to make you discard (Ruined Village is already the worst Ruin), and I don't think it needs to fish Curses from the Trash.
I also agree with Commodore Chuckles that Copper is a bad card, and it is nearly always possible to beat Copper-centric strategies. You are of course welcome to make any cards you enjoy playing with, but you will receive constructive and honest feedback from posting here. Some ideas can be improved, but sometimes you try something else; Donald X. shared his
numerous ideas that didn't make it (a fascinating read). But at the end of the day, you do you, and just enjoy playing the game.