Prototype Portal
Clock of Omens
Grinding Station
Ancient Den

   Prerequisites

What do I need to start this combo?
Ancient Den in exile (Ancient Den exiled by Prototype Portal in exile).
All other permanents on the battlefield.

   Steps

How does this combo work?
1
Activate Prototype Portal by paying 0 and tapping it, creating a token copy of Ancient Den.
2
The Ancient Den token enters, triggering Grinding Station, untapping Grinding Station.
3
Activate Clock of Omens by tapping the Ancient Den token and Grinding Station, untapping Prototype Portal.
4
Repeat.

   Results

What do I get from this combo?
Infinite landfall triggers
Infinite tapped land tokens
Osgir, the Reconstructor
0.1%inclusion6 decks4.90K decks
Breya, Etherium Shaper
0.0%inclusion6 decks20.6K decks
Urtet, Remnant of Memnarch
0.0%inclusion6 decks16.6K decks
Ragost, Deft Gastronaut
0.0%inclusion6 decks15.1K decks
Tameshi, Reality Architect
0.2%inclusion5 decks3.20K decks
Jan Jansen, Chaos Crafter
0.1%inclusion5 decks4.98K decks
Oswald Fiddlebender
0.2%inclusion4 decks2.14K decks
Urza, Prince of Kroog
0.1%inclusion3 decks2.46K decks
Sundial, Dawn Tyrant
0.5%inclusion1 decks221 decks
Stenn, Paranoid Partisan
0.1%inclusion1 decks682 decks
Teysa, Opulent Oligarch
0.0%inclusion1 decks2.92K decks
Saruman of Many Colors
0.0%inclusion1 decks4.81K decks
Tawnos, Solemn Survivor
0.1%inclusion1 decks1.23K decks
Silas Renn, Seeker Adept // Yoshimaru, Ever Faithful
0.5%inclusion1 decks203 decks
Ravos, Soultender // Toggo, Goblin Weaponsmith
2.3%inclusion1 decks44 decks
Reaper King
0.0%inclusion1 decks8.39K decks
Alibou, Ancient Witness
0.0%inclusion1 decks2.26K decks
Sami, Wildcat Captain
0.0%inclusion1 decks4.25K decks
New Cards
Advanced Reconstruction
33%inclusion1 decks3 decks
Ark of Hunger
33%inclusion1 decks3 decks
Relic Retriever
33%inclusion1 decks3 decks
Sewer-veillance Cam
17%inclusion1 decks6 decks
Krang, Utrom Warlord
14%inclusion2 decks14 decks
High Synergy Cards
Tree of Tales
100%inclusion8 decks8 decks
Vault of Whispers
96%inclusion22 decks23 decks
Great Furnace
97%inclusion35 decks36 decks
Seat of the Synod
93%inclusion25 decks27 decks
Darksteel Citadel
89%inclusion50 decks56 decks
Copper Myr
75%inclusion6 decks8 decks
Myr Retriever
64%inclusion36 decks56 decks
Krark-Clan Ironworks
61%inclusion34 decks56 decks
Treasure Vault
55%inclusion31 decks56 decks
Scrap Trawler
54%inclusion30 decks56 decks
Top Cards
Emry, Lurker of the Loch
52%inclusion14 decks27 decks
Sculpting Steel
50%inclusion28 decks56 decks
Master Transmuter
44%inclusion12 decks27 decks
Foundry Inspector
43%inclusion24 decks56 decks
Unwinding Clock
41%inclusion23 decks56 decks
Mystic Forge
39%inclusion22 decks56 decks
Weapons Manufacturing
39%inclusion9 decks23 decks
Leaden Myr
39%inclusion9 decks23 decks
Iron Myr
39%inclusion14 decks36 decks
Thopter Foundry
38%inclusion6 decks16 decks
Game Changers
Enlightened Tutor
29%inclusion16 decks56 decks
Vampiric Tutor
26%inclusion6 decks23 decks
Smothering Tithe
23%inclusion13 decks56 decks
Demonic Tutor
22%inclusion5 decks23 decks
The One Ring
18%inclusion10 decks56 decks
Mana Vault
16%inclusion9 decks56 decks
Bolas's Citadel
13%inclusion3 decks23 decks
Mishra's Workshop
11%inclusion6 decks56 decks
Grim Monolith
11%inclusion6 decks56 decks
Ancient Tomb
8.9%inclusion5 decks56 decks
Creatures
Esper Sentinel
38%inclusion21 decks56 decks
Goblin Welder
36%inclusion13 decks36 decks
Solemn Simulacrum
34%inclusion19 decks56 decks
Goblin Engineer
33%inclusion12 decks36 decks
Etherium Sculptor
33%inclusion9 decks27 decks
Gold Myr
32%inclusion18 decks56 decks
Dross Scorpion
30%inclusion17 decks56 decks
Silver Myr
30%inclusion8 decks27 decks
Sai, Master Thopterist
30%inclusion8 decks27 decks
Academy Manufactor
29%inclusion16 decks56 decks
Junk Diver
27%inclusion15 decks56 decks
Oswald Fiddlebender
27%inclusion15 decks56 decks
Myr Battlesphere
27%inclusion15 decks56 decks
Walking Ballista
27%inclusion15 decks56 decks
Marionette Master
26%inclusion6 decks23 decks
Padeem, Consul of Innovation
26%inclusion7 decks27 decks
Reckless Fireweaver
25%inclusion9 decks36 decks
Mondrak, Glory Dominus
25%inclusion14 decks56 decks
Palladium Myr
23%inclusion13 decks56 decks
Ornithopter of Paradise
23%inclusion13 decks56 decks
Trophy Mage
22%inclusion6 decks27 decks
Thought Monitor
22%inclusion6 decks27 decks
Teshar, Ancestor's Apostle
21%inclusion12 decks56 decks
Myr Galvanizer
20%inclusion11 decks56 decks
Shimmer Myr
20%inclusion11 decks56 decks
Magda, Brazen Outlaw
19%inclusion7 decks36 decks
Ethersworn Adjudicator
19%inclusion3 decks16 decks
Sharuum the Hegemon
19%inclusion3 decks16 decks
Baleful Strix
19%inclusion3 decks16 decks
Arcum Dagsson
19%inclusion5 decks27 decks
Ruin Crab
19%inclusion5 decks27 decks
The Reality Chip
19%inclusion5 decks27 decks
Spellskite
19%inclusion5 decks27 decks
Urza, Lord High Artificer
19%inclusion5 decks27 decks
Phyrexian Metamorph
19%inclusion5 decks27 decks
Myr Welder
18%inclusion10 decks56 decks
Ethersworn Canonist
18%inclusion10 decks56 decks
Sami, Wildcat Captain
17%inclusion4 decks23 decks
Pitiless Plunderer
17%inclusion4 decks23 decks
Zirda, the Dawnwaker
17%inclusion6 decks36 decks
Alloy Myr
16%inclusion9 decks56 decks
Mycosynth Golem
16%inclusion9 decks56 decks
Jan Jansen, Chaos Crafter
16%inclusion3 decks19 decks
Mayhem Devil
16%inclusion3 decks19 decks
Mirran Spy
15%inclusion4 decks27 decks
Chief Engineer
15%inclusion4 decks27 decks
Vedalken Archmage
15%inclusion4 decks27 decks
Trinket Mage
15%inclusion4 decks27 decks
Cyberdrive Awakener
15%inclusion4 decks27 decks
Kuldotha Forgemaster
14%inclusion8 decks56 decks
Instants
Swords to Plowshares
38%inclusion21 decks56 decks
Counterspell
37%inclusion10 decks27 decks
Path to Exile
36%inclusion20 decks56 decks
Dispatch
32%inclusion18 decks56 decks
Whir of Invention
26%inclusion7 decks27 decks
Muddle the Mixture
26%inclusion7 decks27 decks
Thirst for Knowledge
22%inclusion6 decks27 decks
Boros Charm
22%inclusion8 decks36 decks
Disruption Protocol
15%inclusion4 decks27 decks
Swan Song
15%inclusion4 decks27 decks
Dovin's Veto
15%inclusion4 decks27 decks
Arcane Denial
15%inclusion4 decks27 decks
Cyclonic Rift
15%inclusion4 decks27 decks
Deflecting Swat
14%inclusion5 decks36 decks
Deadly Dispute
13%inclusion3 decks23 decks
Generous Gift
13%inclusion7 decks56 decks
Strix Serenade
11%inclusion3 decks27 decks
An Offer You Can't Refuse
11%inclusion3 decks27 decks
Teferi's Protection
8.9%inclusion5 decks56 decks
Untimely Malfunction
8.6%inclusion3 decks35 decks
Clever Concealment
7.1%inclusion4 decks56 decks
Silence
7.1%inclusion4 decks56 decks
Dawn's Truce
5.7%inclusion3 decks53 decks
Pull from Eternity
5.4%inclusion3 decks56 decks
Faith's Reward
5.4%inclusion3 decks56 decks
Return to Dust
5.4%inclusion3 decks56 decks
Stroke of Midnight
5.4%inclusion3 decks56 decks
Flawless Maneuver
5.4%inclusion3 decks56 decks
Sorceries
Fabricate
37%inclusion10 decks27 decks
Organic Extinction
18%inclusion10 decks56 decks
Vandalblast
17%inclusion6 decks36 decks
Blasphemous Act
17%inclusion6 decks36 decks
Sevinne's Reclamation
16%inclusion9 decks56 decks
Forging the Anchor
15%inclusion4 decks27 decks
Reshape
15%inclusion4 decks27 decks
Thoughtcast
15%inclusion4 decks27 decks
Wake the Past
14%inclusion5 decks36 decks
Beseech the Queen
13%inclusion3 decks23 decks
Diabolic Tutor
13%inclusion3 decks23 decks
Scrap Mastery
11%inclusion4 decks36 decks
Transmute Artifact
11%inclusion3 decks27 decks
Faithless Looting
11%inclusion4 decks36 decks
Trash for Treasure
8.3%inclusion3 decks36 decks
Wheel of Fortune
8.3%inclusion3 decks36 decks
Jeska's Will
8.3%inclusion3 decks36 decks
Vanquish the Horde
7.1%inclusion4 decks56 decks
All Is Dust
5.4%inclusion3 decks56 decks
Approach of the Second Sun
5.4%inclusion3 decks56 decks
Austere Command
5.4%inclusion3 decks56 decks
Utility Artifacts
Staff of Domination
32%inclusion18 decks56 decks
Sensei's Divining Top
32%inclusion18 decks56 decks
Blasting Station
30%inclusion17 decks56 decks
Ichor Wellspring
30%inclusion17 decks56 decks
Mycosynth Lattice
29%inclusion16 decks56 decks
Rings of Brighthearth
29%inclusion16 decks56 decks
Lightning Greaves
29%inclusion16 decks56 decks
Transmutation Font
27%inclusion15 decks56 decks
Mishra's Bauble
27%inclusion15 decks56 decks
Cloud Key
27%inclusion15 decks56 decks
Aether Spellbomb
26%inclusion7 decks27 decks
Myr Turbine
25%inclusion14 decks56 decks
Ashnod's Altar
25%inclusion14 decks56 decks
Salvaging Station
23%inclusion13 decks56 decks
Ugin's Nexus
23%inclusion13 decks56 decks
Voltaic Key
21%inclusion12 decks56 decks
Moonsilver Key
21%inclusion12 decks56 decks
Darksteel Forge
21%inclusion12 decks56 decks
Nuka-Cola Vending Machine
20%inclusion11 decks56 decks
Mirage Mirror
20%inclusion11 decks56 decks
Expedition Map
20%inclusion11 decks56 decks
Time Sieve
19%inclusion3 decks16 decks
Encroaching Mycosynth
19%inclusion5 decks27 decks
Repurposing Bay
18%inclusion4 decks22 decks
Skullclamp
18%inclusion10 decks56 decks
Summoning Station
16%inclusion9 decks56 decks
Lithoform Engine
16%inclusion9 decks56 decks
Manifold Key
16%inclusion9 decks56 decks
Thousand-Year Elixir
16%inclusion9 decks56 decks
Aetherflux Reservoir
16%inclusion9 decks56 decks
Idol of Oblivion
16%inclusion9 decks56 decks
Sword of the Meek
14%inclusion8 decks56 decks
Magistrate's Scepter
14%inclusion8 decks56 decks
Mycosynth Wellspring
14%inclusion8 decks56 decks
Semblance Anvil
14%inclusion8 decks56 decks
Soul-Guide Lantern
14%inclusion8 decks56 decks
Forsaken Monument
14%inclusion8 decks56 decks
Illusionist's Bracers
13%inclusion7 decks56 decks
Thousand Moons Smithy
13%inclusion7 decks56 decks
Archaeomancer's Map
13%inclusion7 decks56 decks
Esoteric Duplicator
11%inclusion3 decks27 decks
Shorikai, Genesis Engine
11%inclusion3 decks27 decks
Heartstone
11%inclusion6 decks56 decks
Mirrorworks
11%inclusion6 decks56 decks
Mimic Vat
11%inclusion6 decks56 decks
Trading Post
11%inclusion6 decks56 decks
Vedalken Orrery
11%inclusion6 decks56 decks
Vexing Bauble
9.4%inclusion5 decks53 decks
Myr Matrix
8.9%inclusion5 decks56 decks
Pithing Needle
8.9%inclusion5 decks56 decks
Enchantments
Mystic Remora
26%inclusion7 decks27 decks
Thopter Spy Network
22%inclusion6 decks27 decks
Biotransference
22%inclusion5 decks23 decks
Retreat to Coralhelm
19%inclusion5 decks27 decks
Training Grounds
19%inclusion5 decks27 decks
Anointed Procession
18%inclusion10 decks56 decks
Artificer's Intuition
15%inclusion4 decks27 decks
Seal of Removal
15%inclusion4 decks27 decks
Imprisoned in the Moon
15%inclusion4 decks27 decks
Rhystic Study
15%inclusion4 decks27 decks
Ghirapur Aether Grid
14%inclusion5 decks36 decks
Agent of the Iron Throne
13%inclusion3 decks23 decks
Does Machines
13%inclusion1 decks8 decks
Mirrodin Besieged
11%inclusion3 decks27 decks
Mechanized Production
11%inclusion3 decks27 decks
Propaganda
11%inclusion3 decks27 decks
Spirit Loop
7.1%inclusion4 decks56 decks
Angelic Renewal
5.4%inclusion3 decks56 decks
Seal of Cleansing
5.4%inclusion3 decks56 decks
Monologue Tax
5.4%inclusion3 decks56 decks
Darksteel Mutation
5.4%inclusion3 decks56 decks
Ghostly Prison
5.4%inclusion3 decks56 decks
Planeswalkers
Daretti, Scrap Savant
31%inclusion11 decks36 decks
Karn, the Great Creator
23%inclusion13 decks56 decks
Tezzeret, Cruel Captain
20%inclusion6 decks30 decks
Quintorius, History Chaser
13%inclusion1 decks8 decks
Tezzeret, Betrayer of Flesh
11%inclusion3 decks27 decks
Karn, Living Legacy
5.4%inclusion3 decks56 decks
Utility Lands
Uthros, Titanic Godcore
46%inclusion6 decks13 decks
Buried Ruin
43%inclusion24 decks56 decks
Inventors' Fair
41%inclusion23 decks56 decks
Academy Ruins
41%inclusion11 decks27 decks
Urza's Saga
30%inclusion17 decks56 decks
Urza's Power Plant
20%inclusion11 decks56 decks
Urza's Mine
20%inclusion11 decks56 decks
Urza's Tower
20%inclusion11 decks56 decks
Archway of Innovation
19%inclusion5 decks27 decks
Adagia, Windswept Bastion
13%inclusion4 decks30 decks
Fomori Vault
13%inclusion7 decks56 decks
Reliquary Tower
13%inclusion7 decks56 decks
Otawara, Soaring City
11%inclusion3 decks27 decks
Cascading Cataracts
8.9%inclusion5 decks56 decks
Urza's Workshop
7.1%inclusion4 decks56 decks
Phyrexia's Core
5.4%inclusion3 decks56 decks
Inkmoth Nexus
5.4%inclusion3 decks56 decks
Strip Mine
5.4%inclusion3 decks56 decks
Urborg, Tomb of Yawgmoth
5.4%inclusion3 decks56 decks
Mana Artifacts
Sol Ring
91%inclusion51 decks56 decks
Arcane Signet
55%inclusion31 decks56 decks
Basalt Monolith
43%inclusion24 decks56 decks
Liquimetal Torque
39%inclusion22 decks56 decks
Thran Dynamo
29%inclusion16 decks56 decks
Lotus Petal
27%inclusion15 decks56 decks
Mind Stone
27%inclusion15 decks56 decks
Orzhov Signet
26%inclusion6 decks23 decks
Azorius Signet
26%inclusion7 decks27 decks
Talisman of Progress
26%inclusion7 decks27 decks
Boros Signet
22%inclusion8 decks36 decks
Mox Opal
21%inclusion12 decks56 decks
Everflowing Chalice
20%inclusion11 decks56 decks
Talisman of Conviction
19%inclusion7 decks36 decks
Talisman of Dominance
19%inclusion3 decks16 decks
Lotus Bloom
18%inclusion10 decks56 decks
Rakdos Signet
16%inclusion3 decks19 decks
Chromatic Star
14%inclusion8 decks56 decks
Patriar's Seal
13%inclusion7 decks56 decks
Bender's Waterskin
11%inclusion3 decks27 decks
Cursed Mirror
11%inclusion4 decks36 decks
Chromatic Orrery
11%inclusion6 decks56 decks
Mox Amber
11%inclusion6 decks56 decks
Commander's Sphere
11%inclusion6 decks56 decks
The Eternity Elevator
10%inclusion3 decks30 decks
Chromatic Lantern
8.9%inclusion5 decks56 decks
Fellwar Stone
8.9%inclusion5 decks56 decks
Myr Reservoir
7.1%inclusion4 decks56 decks
Slagstone Refinery
7.1%inclusion4 decks56 decks
Sol Talisman
7.1%inclusion4 decks56 decks
Hedron Archive
7.1%inclusion4 decks56 decks
Gilded Lotus
7.1%inclusion4 decks56 decks
Thought Vessel
7.1%inclusion4 decks56 decks
Fabrication Foundry
5.4%inclusion3 decks56 decks
Chromatic Sphere
5.4%inclusion3 decks56 decks
Victory Chimes
5.4%inclusion3 decks56 decks
Dreamstone Hedron
5.4%inclusion3 decks56 decks
Staff of Compleation
5.4%inclusion3 decks56 decks
Worn Powerstone
5.4%inclusion3 decks56 decks
Lands
Silverbluff Bridge
86%inclusion12 decks14 decks
Drossforge Bridge
74%inclusion14 decks19 decks
Tanglepool Bridge
71%inclusion5 decks7 decks
Command Tower
71%inclusion40 decks56 decks
Mistvault Bridge
69%inclusion11 decks16 decks
Goldmire Bridge
65%inclusion15 decks23 decks
Rustvale Bridge
64%inclusion23 decks36 decks
Thornglint Bridge
63%inclusion5 decks8 decks
Slagwoods Bridge
63%inclusion5 decks8 decks
Razortide Bridge
59%inclusion16 decks27 decks
Darkmoss Bridge
57%inclusion4 decks7 decks
Power Depot
36%inclusion20 decks56 decks
Deserted Beach
33%inclusion9 decks27 decks
Sacred Foundry
33%inclusion12 decks36 decks
Hallowed Fountain
33%inclusion9 decks27 decks
Adarkar Wastes
30%inclusion8 decks27 decks
Exotic Orchard
29%inclusion16 decks56 decks
The Mycosynth Gardens
25%inclusion14 decks56 decks
Battlefield Forge
25%inclusion9 decks36 decks
Spire of Industry
23%inclusion13 decks56 decks
Spectator Seating
22%inclusion8 decks36 decks
Sea of Clouds
22%inclusion6 decks27 decks
Clifftop Retreat
22%inclusion8 decks36 decks
Shattered Sanctum
22%inclusion5 decks23 decks
Nomad Outpost
21%inclusion4 decks19 decks
City of Brass
20%inclusion11 decks56 decks
Arid Mesa
20%inclusion11 decks56 decks
Plateau
19%inclusion7 decks36 decks
Azorius Chancery
19%inclusion5 decks27 decks
Skycloud Expanse
19%inclusion5 decks27 decks
Radiant Summit
17%inclusion4 decks23 decks
Vault of Champions
17%inclusion4 decks23 decks
Godless Shrine
17%inclusion4 decks23 decks
Urza's Cave
16%inclusion9 decks56 decks
Badlands
16%inclusion3 decks19 decks
Savai Triome
16%inclusion3 decks19 decks
Blood Crypt
16%inclusion3 decks19 decks
Glacial Fortress
15%inclusion4 decks27 decks
Glimmervoid
14%inclusion8 decks56 decks
Reflecting Pool
14%inclusion8 decks56 decks
Inspiring Vantage
14%inclusion5 decks36 decks
Sunscorched Divide
14%inclusion5 decks36 decks
Rugged Prairie
14%inclusion5 decks36 decks
Sunbillow Verge
13%inclusion4 decks30 decks
Scrubland
13%inclusion3 decks23 decks
Mana Confluence
13%inclusion7 decks56 decks
Hengegate Pathway
11%inclusion3 decks27 decks
Sundown Pass
11%inclusion4 decks36 decks
Temple of Enlightenment
11%inclusion3 decks27 decks
Flooded Strand
11%inclusion6 decks56 decks