Lich lord king of the underworld, a card from way back.
When hes tributed by a card effect, he returns to your hand.
Although the first line of thought is to use it with ectoplasmer, have you ever considered using him for something else?
Similarly to heiratics, he gets his effect when he is tributed. So, you can borrow a line from the heiratics decks that make use of him for ritual summoning
Once he's used to ritual summon, he returns to the hand. If you combine it with ritual fiends in the graveyard, you can ritual summon with minimal demerit.