Krrik, Son of Yawgmoth Phyrexian mana is an absurdly strong mechanic whose ripples have been felt across all Magic formats since its introduction in New Phyrexia over a decade ago
This way, anything they could have done while in the graveyard is no longer a threat to you
Cut Your Losses is Traumatize for one extra mana, but with casualty youll get two copies of it, which will dump a bunch of an opponents deck into their graveyard
Legendary Creature - Praetor Phyrexian Vat of Rebirth Whenever another artifact or creature you control is put into a graveyard from the battlefield, put an oil counter on this artifact
(If a permanent with a stun counter would become untapped, remove one from it instead.) The enters-the-battlefield ability can target an artifact or creature that's already tapped
Completing the cycle of mythic rares, there's Emeritus of Abundance (Regrowth), Emeritus of Conflict (Lightning Bolt), and Emeritus of Truce (Swords to Plowshares)