using mtg cards in d&d Phyrexian Vault (21/74) DD Phyrexia vs. the Coalition LP Everything announced at D&D Direct:

All things considered, it's a very low mana investment for how well it synergizes and interacts with the decks that want to include it

If you discard a card while you control Hades, Sorcerer of Eld, abilities that function when a card is discarded (such as madness) still work, even though that card never reaches your graveyard

They knew that Mono-Red, the only deck that could really compete with Cauldron, would just become the new bully

Duskwatch Recruiter This has mostly been known as a combo piece in Modern to draw through your deck once you've made infinite mana with Devoted Druid and Vizier of Remedies, but Duskwatch Recruiter has way more than that going for it