Merfolk Secretkeeper + Underworld Breach + Ashnod's Altar + Chromatic Orrery
Merfolk Secretkeeper
Underworld Breach
Ashnod's Altar
Chromatic Orrery
Requires
Merfolk Secretkeeper // Venture Deeper must be in the graveyard.
Underworld Breach must be on the battlefield.
Ashnod's Altar must be on the battlefield.
Chromatic Orrery must be on the battlefield.
You have at least three other cards in your graveyard.
Mana needed: 
Steps
- Cast Venture Deeper from your graveyard for its escape cost by paying
and exiling three other cards from your graveyard, causing you to mill four cards and then exiling Venture Deeper. - Cast Merfolk Secretkeeper from exile by paying .
- Activate Ashnod's Altar by sacrificing Merfolk Secretkeeper, adding .
- Repeat.
Results
Infinite self-mill. Near-infinite death triggers. Near-infinite ETB. Near-infinite LTB. Near-infinite magecraft triggers. Near-infinite mill. Near-infinite sacrifice triggers. Near-infinite storm count.
Kess, Dissident Mage
0.04% of 7209 decks
3 decks
Kykar, Wind's Fury
0.01% of 10180 decks
1 decks
High Synergy Cards
Frantic Search
100% of 4 decks
+88% synergy
Windfall
100% of 4 decks
+87% synergy
Jeska's Will
100% of 4 decks
+82% synergy
Creatures
Fell Horseman
100% of 1 decks
+100% synergy
Two-Headed Hunter
100% of 1 decks
+100% synergy
Horned Loch-Whale
100% of 1 decks
+99% synergy
Picklock Prankster
100% of 1 decks
+99% synergy
Spellscorn Coven
100% of 1 decks
+99% synergy
Scalding Viper
100% of 1 decks
+98% synergy
Moon-Blessed Cleric
100% of 1 decks
+98% synergy
Cruel Somnophage
100% of 1 decks
+98% synergy
Elsha of the Infinite
100% of 1 decks
+97% synergy
Decadent Dragon
100% of 1 decks
+95% synergy
Esper Sentinel
100% of 1 decks
+79% synergy
Lier, Disciple of the Drowned
75% of 4 decks
+74% synergy
Foulmire Knight
67% of 3 decks
+66% synergy
Murderous Rider
67% of 3 decks
+64% synergy
Merchant of the Vale
50% of 4 decks
+50% synergy
Hypnotic Sprite
50% of 4 decks
+49% synergy
Brazen Borrower
50% of 4 decks
+49% synergy
Dragon's Rage Channeler
50% of 4 decks
+48% synergy
Baral, Chief of Compliance
50% of 4 decks
+47% synergy
Ledger Shredder
50% of 4 decks
+46% synergy
Displacer Kitten
50% of 4 decks
+44% synergy
Thassa's Oracle
50% of 4 decks
+43% synergy
Dockside Extortionist
50% of 4 decks
+37% synergy
Order of Midnight
33% of 3 decks
+33% synergy
Ancient Brass Dragon
33% of 3 decks
+31% synergy
Nightscape Familiar
33% of 3 decks
+31% synergy
Opposition Agent
33% of 3 decks
+26% synergy
Notion Thief
33% of 3 decks
+26% synergy
Stormbound Geist
25% of 4 decks
+25% synergy
Cathodion
25% of 4 decks
+25% synergy
Young Red Dragon
25% of 4 decks
+25% synergy
Young Blue Dragon
25% of 4 decks
+25% synergy
Grinning Ignus
25% of 4 decks
+24% synergy
Memnite
25% of 4 decks
+24% synergy
Sword Coast Serpent
25% of 4 decks
+24% synergy
Illithid Harvester
25% of 4 decks
+24% synergy
Mizzix of the Izmagnus
25% of 4 decks
+24% synergy
Sapphire Dragon
25% of 4 decks
+24% synergy
Chandra's Incinerator
25% of 4 decks
+23% synergy
Spellseeker
25% of 4 decks
+21% synergy
Young Pyromancer
25% of 4 decks
+20% synergy
Birgi, God of Storytelling
25% of 4 decks
+19% synergy
Archmage Emeritus
25% of 4 decks
+17% synergy
Niv-Mizzet, Parun
25% of 4 decks
+17% synergy
Storm-Kiln Artist
25% of 4 decks
+16% synergy
Goblin Electromancer
25% of 4 decks
+16% synergy
Instants
Pull from Eternity
100% of 1 decks
+100% synergy
Maestros Charm
100% of 3 decks
+97% synergy
Lim-Dûl's Vault
100% of 3 decks
+96% synergy
Cabal Ritual
100% of 3 decks
+95% synergy
Silence
100% of 1 decks
+94% synergy
Enlightened Tutor
100% of 1 decks
+82% synergy
Teferi's Protection
100% of 1 decks
+80% synergy
Brain Freeze
75% of 4 decks
+72% synergy
Fact or Fiction
75% of 4 decks
+68% synergy
Thrill of Possibility
75% of 4 decks
+65% synergy
Mystical Tutor
75% of 4 decks
+60% synergy
Cyclonic Rift
75% of 4 decks
+47% synergy
Vampiric Tutor
67% of 3 decks
+48% synergy
Dark Ritual
67% of 3 decks
+44% synergy
Hostile Negotiations
50% of 2 decks
+49% synergy
Muddle the Mixture
50% of 4 decks
+45% synergy
Snap
50% of 4 decks
+43% synergy
Brainstorm
50% of 4 decks
+29% synergy
Otherworldly Gaze
25% of 4 decks
+24% synergy
Thought Scour
25% of 4 decks
+23% synergy
Desperate Ritual
25% of 4 decks
+23% synergy
Pyretic Ritual
25% of 4 decks
+22% synergy
Dispel
25% of 4 decks
+20% synergy
Izzet Charm
25% of 4 decks
+20% synergy
Seething Song
25% of 4 decks
+19% synergy
Consider
25% of 4 decks
+19% synergy
Valakut Awakening
25% of 4 decks
+19% synergy
Pact of Negation
25% of 4 decks
+18% synergy
Force of Negation
25% of 4 decks
+16% synergy
Force of Will
25% of 4 decks
+14% synergy
Pongify
25% of 4 decks
+13% synergy
Mana Drain
25% of 4 decks
+10% synergy
Deflecting Swat
25% of 4 decks
+9% synergy
Swan Song
25% of 4 decks
+8% synergy
Fierce Guardianship
25% of 4 decks
+7% synergy
An Offer You Can't Refuse
25% of 4 decks
+4% synergy
Negate
25% of 4 decks
+2% synergy
Counterspell
25% of 4 decks
-18% synergy
Sorceries
Plea for Guidance
100% of 1 decks
+100% synergy
Idyllic Tutor
100% of 1 decks
+95% synergy
Sevinne's Reclamation
100% of 1 decks
+93% synergy
Faithless Looting
75% of 4 decks
+58% synergy
Peer into the Abyss
67% of 3 decks
+63% synergy
Toxic Deluge
67% of 3 decks
+49% synergy
Demonic Tutor
67% of 3 decks
+44% synergy
Wheel of Fortune
50% of 4 decks
+45% synergy
Expressive Iteration
50% of 4 decks
+43% synergy
Ponder
50% of 4 decks
+37% synergy
Secret Salvage
33% of 3 decks
+33% synergy
Yawgmoth's Will
33% of 3 decks
+32% synergy
Crux of Fate
33% of 3 decks
+31% synergy
Imperial Seal
33% of 3 decks
+28% synergy
Reanimate
33% of 3 decks
+18% synergy
Collected Conjuring
25% of 4 decks
+25% synergy
Dragon's Approach
25% of 4 decks
+25% synergy
Strategic Planning
25% of 4 decks
+24% synergy
Change of Fortune
25% of 4 decks
+24% synergy
Haze of Rage
25% of 4 decks
+24% synergy
Burning Inquiry
25% of 4 decks
+24% synergy
Commit // Memory
25% of 4 decks
+24% synergy
Echo of Eons
25% of 4 decks
+23% synergy
Mystic Retrieval
25% of 4 decks
+23% synergy
Strike It Rich
25% of 4 decks
+23% synergy
Mizzix's Mastery
25% of 4 decks
+22% synergy
Rite of Flame
25% of 4 decks
+22% synergy
Grapeshot
25% of 4 decks
+21% synergy
Serum Visions
25% of 4 decks
+21% synergy
Solve the Equation
25% of 4 decks
+20% synergy
Treasure Cruise
25% of 4 decks
+20% synergy
Gitaxian Probe
25% of 4 decks
+19% synergy
Fabricate
25% of 4 decks
+19% synergy
Preordain
25% of 4 decks
+14% synergy
Blasphemous Act
25% of 4 decks
-9% synergy
Utility Artifacts
Phyrexian Altar
50% of 4 decks
+46% synergy
Ghost Lantern
33% of 3 decks
+33% synergy
Spellweaver Helix
25% of 4 decks
+25% synergy
Lucky Clover
25% of 4 decks
+25% synergy
Locket of Yesterdays
25% of 4 decks
+25% synergy
Grinding Station
25% of 4 decks
+24% synergy
Thrumming Stone
25% of 4 decks
+24% synergy
Primal Amulet
25% of 4 decks
+24% synergy
Mesmeric Orb
25% of 4 decks
+24% synergy
Elixir of Immortality
25% of 4 decks
+23% synergy
Two-Handed Axe
25% of 4 decks
+23% synergy
Altar of Dementia
25% of 4 decks
+22% synergy
Enchantments
Wild Research
100% of 1 decks
+99% synergy
Solemnity
100% of 1 decks
+99% synergy
Smothering Tithe
100% of 1 decks
+75% synergy
Necropotence
67% of 3 decks
+61% synergy
Fiery Inscription
50% of 2 decks
+46% synergy
Rhystic Study
50% of 4 decks
+22% synergy
Pain Magnification
33% of 3 decks
+33% synergy
Harness the Storm
25% of 4 decks
+25% synergy
Mana Echoes
25% of 4 decks
+24% synergy
Arcane Adaptation
25% of 4 decks
+24% synergy
Thousand-Year Storm
25% of 4 decks
+20% synergy
Goblin Bombardment
25% of 4 decks
+19% synergy
Mystic Remora
25% of 4 decks
+7% synergy
Planeswalkers
Narset of the Ancient Way
100% of 1 decks
+97% synergy
Saheeli, Sublime Artificer
25% of 4 decks
+20% synergy
Utility Lands
Mistveil Plains
100% of 1 decks
+99% synergy
Hall of Heliod's Generosity
100% of 1 decks
+93% synergy
Otawara, Soaring City
75% of 4 decks
+58% synergy
Takenuma, Abandoned Mire
67% of 3 decks
+56% synergy
Cabal Coffers
67% of 3 decks
+56% synergy
Urborg, Tomb of Yawgmoth
50% of 4 decks
+40% synergy
Ancient Tomb
50% of 4 decks
+39% synergy
Mystic Sanctuary
50% of 4 decks
+38% synergy
Reliquary Tower
50% of 4 decks
+21% synergy
Phyrexian Tower
33% of 3 decks
+25% synergy
High Market
25% of 4 decks
+22% synergy
Academy Ruins
25% of 4 decks
+20% synergy
Sokenzan, Crucible of Defiance
25% of 4 decks
+20% synergy
Urza's Saga
25% of 4 decks
+18% synergy
Mana Artifacts
Arcane Signet
100% of 4 decks
+28% synergy
Sol Ring
100% of 4 decks
+16% synergy
Lotus Petal
75% of 4 decks
+68% synergy
Fellwar Stone
75% of 4 decks
+54% synergy
Mana Crypt
50% of 4 decks
+41% synergy
Lion's Eye Diamond
25% of 4 decks
+23% synergy
Mox Diamond
25% of 4 decks
+21% synergy
Mox Opal
25% of 4 decks
+21% synergy
Chrome Mox
25% of 4 decks
+19% synergy
Mana Vault
25% of 4 decks
+19% synergy
Thought Vessel
25% of 4 decks
+8% synergy
Lands
Sea of Clouds
100% of 1 decks
+74% synergy
Xander's Lounge
100% of 3 decks
+72% synergy
Blood Crypt
100% of 3 decks
+61% synergy
Watery Grave
100% of 3 decks
+59% synergy
Command Tower
100% of 4 decks
+26% synergy
City of Brass
75% of 4 decks
+67% synergy
Exotic Orchard
75% of 4 decks
+39% synergy
Steam Vents
75% of 4 decks
+36% synergy
Underground River
67% of 3 decks
+47% synergy
Sulfurous Springs
67% of 3 decks
+47% synergy
Morphic Pool
67% of 3 decks
+40% synergy
Forbidden Orchard
50% of 4 decks
+47% synergy
Reflecting Pool
50% of 4 decks
+45% synergy
Mana Confluence
50% of 4 decks
+43% synergy
Bloodstained Mire
50% of 4 decks
+40% synergy
Scalding Tarn
50% of 4 decks
+39% synergy
Polluted Delta
50% of 4 decks
+39% synergy
Shivan Reef
50% of 4 decks
+23% synergy
The Mycosynth Gardens
33% of 3 decks
+31% synergy
Sunken Ruins
33% of 3 decks
+29% synergy
Graven Cairns
33% of 3 decks
+26% synergy
Badlands
33% of 3 decks
+20% synergy
Temple of Malice
33% of 3 decks
+19% synergy
Underground Sea
33% of 3 decks
+19% synergy
Haunted Ridge
33% of 3 decks
+17% synergy
Shipwreck Marsh
33% of 3 decks
+14% synergy
Drowned Catacomb
33% of 3 decks
+8% synergy
Luxury Suite
33% of 3 decks
+7% synergy
Cavern of Souls
25% of 4 decks
+18% synergy
Fabled Passage
25% of 4 decks
+16% synergy
Wooded Foothills
25% of 4 decks
+15% synergy
Flooded Strand
25% of 4 decks
+14% synergy
Arid Mesa
25% of 4 decks
+14% synergy
Marsh Flats
25% of 4 decks
+14% synergy
Verdant Catacombs
25% of 4 decks
+14% synergy
Misty Rainforest
25% of 4 decks
+13% synergy
Cascade Bluffs
25% of 4 decks
+13% synergy
Volcanic Island
25% of 4 decks
+11% synergy
Stormcarved Coast
25% of 4 decks
+8% synergy
Myriad Landscape
25% of 4 decks
+5% synergy
Evolving Wilds
25% of 4 decks
+4% synergy
Training Center
25% of 4 decks
-3% synergy
Sulfur Falls
25% of 4 decks
-5% synergy