Myrkul, Lord of Bones (Check it out here) was built as the leader of a Midrange and Constellation deck that ran a bunch of dorks with ETB abilities for value (like Liliana's Specter and Archon of Cruelty), sacrificed them for value (High Market and Dockside Chef), netted a return as an enchantment to trigger another ETB for it and constellation dorks (like Underworld Coinsmith and Eidolon of Blossoms) and then added in some ramp, answers, card flow, and called it a deck
Of course, Sunforger is a huge pull for RW equipment
Whenever you discard a nonland card, you may cast it from your graveyard
It was also one of the defenses against Necropotence decks, since you could shrug off discard and if they played Necropotence they wouldn't get the Mine card
This is something Magic would not do again till years later, with the Mirrodin block