Sefris, Dungeon Speed-Runner v1.1.MKM (EDH / Commander) [Revision 27]

'Sefris of the Hidden Ways' leverages a creature heavy, Dungeon pay-off value engine with 'Radiant Solar' as a capable lieutenant. Emphasis with the creatures lies in the ability to move to and from the graveyard without additional tools, satisfying Sefris requirment and providing additional value. Herald of the Forgotten and Plague Wind help to overwhelm the table.

Creature Value Highlights:

Protection + Graveyard triggers:

Glen Elendra Archmage - sac to counter, goes to grave and persists back to the 'field.
Siren Stormtamer - sac to counter, goes to grave.

Removal + Graveyard trigger:

Angel of the Ruins - removal ETB, cycle ramp --> to grave.
Shriekmaw - removal ETB, evoke to grave.
Solitude - removal ETB, evoke to grave.
Plaguecrafter - sac ETB --> to grave

Cycling 17 - Graveyard trigger + draw to accelerate dungeon triggers:

Angel of the Ruins
Timeless Dragon
Scion of Darkness
Nimble Obstructionist
Archfiend of Ifnir
Imposing Vantasaur - 1 to cycle
Splendor Mare - 1 to cycle
Flourishing Fox - 1 to cycle
Horror of the Broken Lands - 1 to cycle
Drannith Healer - 1 to cycle
Vizier of Tumbling Sands
Striped Riverwinder - 1 to cycle
Curator of Mysteries - 1 to cycle, good target to pull back from graveyard for free as a flyer.
Street Wraith - cycle for 2 life
Undead Gladiator - discard (preferably a creature card to trigger Sefris) to return to hand (and cycle again).
Lurching Rotbeast - 1 to cycle
Windcaller Aven - 1 to cycle, good target to pull back from graveyard for free as a flyer.

Draw + Graveyard triggers:

Mulldrifter - draw 2 ETB, evoke to grave.
Champion of Wits - draw/discard on ETB, self-recur from grave.

Tutor + Graveyard triggers:

Drift of Phantasms - Transmute to graveyard, tutor.
Dimir House Guard - Transmute to graveyard, tutor.

Dungeon Triggers:

Radiant Solar - any of your non-token creatures upon ETB.
Triumphant Adventurer - Dungeon attack trigger
Barrowin of Clan Undurr - ETB trigger, recur power 3 or less from grave upon attack.
Midnight Pathlighter - single trigger for creatures damaging a player.
Nadaar, Selfless Paladin - ETB + attack
Immovable Rod - untap trigger
Thorough Investigation - sac clue token trigger
Rilsa Rael, Kingpin ETB Initiative, adds Undercity dungeon option + powers strong attacks.
Acererak the Archlich - ETB dungeon trigger.

Other Notes:

Sakashima the Impostor - clone Sefris for double triggers.
Archfiend of Ifnir - Plays into your Cycle heavy creature set to wither opponents creatures.
Master of Death - reusable graveyard trigger, self-recur to hand.
Oversold Cemetery - Return (cycling) creatures to hand.
Phyrexian Reclamation - Return (cycling) creatures to hand.
Dakkon, Shadow Slayer - +1 surveil2 for grave trigger, -3 for removal.
Vanish into Memory - temporary removal + draw or protection + ETB trigger on your own creature, then discard (grave trigger).
Tortured Existence - discard creature card to grave + recur another creature to hand: 1 mana dungeon trigger on loop each turn w/ Sefris.
Phyrexian Tower - sac (+grave trigger) for ramp.
Riptide Laboratory - bounce wizards (Sefris) to hand for protection and ETBs.
Gift of Immortality - protect Sefris in theme or any creature for recurring grave + ETB/LTB triggers.
Strionic Resonator - Copy triggered ability for 2 (double up Sefris abilities + others)

Interesting cards not in the current build:

Benevolent Bodyguard - sac for protection, goes to grave.
Overcharged Amalgam - exploit to counter, grave trigger.
Ravenloft Adventurer - ETB initiative. Exile opponents creatures instead of graveyard, deal damage for each.
Yuan-Ti Malison - Dungeon trigger on combat damage to opponent.
Sidisi, Undead Vizier - opt to sac a creature ETB, tutor a card to hand.
Morbid Opportunist - draws 1 card per turn for any other creature death.
Grim Haruspex - draws 1 card per your non-token creature death.
Corpse Connoisseur - tutor to grave ETB, self-recur via unearth.
Wispmare - removal ETB, evoke to grave.
Doomed Necromancer - sac, recur to 'field --> goes to grave.
Obsessive Stitcher - sac, recur to 'field --> goes to grave.
Athreos, God of Passage - creatures upon grave --> recur to hand.
Liesa, Forgotten Archangel - creatures upon grave --> recur to hand.
Priest of Fell Rites - sac to grave, self-recur via unearth
Luminous Broodmoth - re-cur non-flying creatures upon grave.
Attrition - Sac a creature to remove a non-black creature.
Hostile Hostel // Creeping Inn - sac (+grave trigger) for flip-side finisher.
Forbidden Alchemy - look at top 4 from library, keep 1, 3 to grave.