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
Ragost, Deft Gastronaut
0.0%inclusion8 decks16.2K decks
Osgir, the Reconstructor
0.1%inclusion6 decks4.93K decks
Breya, Etherium Shaper
0.0%inclusion6 decks21.4K decks
Urtet, Remnant of Memnarch
0.0%inclusion6 decks17.2K decks
Tameshi, Reality Architect
0.2%inclusion5 decks3.28K decks
Jan Jansen, Chaos Crafter
0.1%inclusion5 decks5.09K decks
Urza, Prince of Kroog
0.1%inclusion3 decks2.48K decks
Oswald Fiddlebender
0.1%inclusion2 decks2.19K decks
Sundial, Dawn Tyrant
0.4%inclusion1 decks229 decks
Stenn, Paranoid Partisan
0.1%inclusion1 decks697 decks
Teysa, Opulent Oligarch
0.0%inclusion1 decks2.91K decks
Saruman of Many Colors
0.0%inclusion1 decks4.99K decks
Tawnos, Solemn Survivor
0.1%inclusion1 decks1.24K decks
Silas Renn, Seeker Adept // Yoshimaru, Ever Faithful
0.4%inclusion1 decks225 decks
Ravos, Soultender // Toggo, Goblin Weaponsmith
2.3%inclusion1 decks43 decks
Reaper King
0.0%inclusion1 decks8.71K decks
Alibou, Ancient Witness
0.0%inclusion1 decks2.36K decks
Sami, Wildcat Captain
0.0%inclusion1 decks4.63K decks
Toph, the First Metalbender
0.0%inclusion1 decks26.8K decks
Gandalf the White
0.0%inclusion1 decks2.81K decks
Cayth, Famed Mechanist
0.0%inclusion1 decks4.88K decks
Sokrates, Athenian Teacher
0.0%inclusion1 decks4.96K decks
Queen Kayla bin-Kroog
0.0%inclusion1 decks2.18K decks
Elmar, Ulvenwald Informant // Wernog, Rider's Chaplain
0.1%inclusion1 decks1.19K decks
New Cards
Ark of Hunger
20%inclusion2 decks10 decks
Advanced Reconstruction
10%inclusion1 decks10 decks
Relic Retriever
10%inclusion1 decks10 decks
Colossus of the Blood Age
10%inclusion1 decks10 decks
Lorehold, the Historian
6.7%inclusion1 decks15 decks
High Synergy Cards
Tree of Tales
100%inclusion9 decks9 decks
Vault of Whispers
92%inclusion23 decks25 decks
Great Furnace
93%inclusion38 decks41 decks
Darksteel Citadel
90%inclusion55 decks61 decks
Seat of the Synod
93%inclusion27 decks29 decks
Copper Myr
67%inclusion6 decks9 decks
Myr Retriever
62%inclusion38 decks61 decks
Krark-Clan Ironworks
61%inclusion37 decks61 decks
Treasure Vault
54%inclusion33 decks61 decks
Scrap Trawler
51%inclusion31 decks61 decks
Top Cards
Emry, Lurker of the Loch
52%inclusion15 decks29 decks
Sculpting Steel
48%inclusion29 decks61 decks
Master Transmuter
45%inclusion13 decks29 decks
Weapons Manufacturing
41%inclusion12 decks29 decks
Unwinding Clock
39%inclusion24 decks61 decks
Mystic Forge
39%inclusion24 decks61 decks
Foundry Inspector
39%inclusion24 decks61 decks
Fabricate
38%inclusion11 decks29 decks
Etherium Sculptor
38%inclusion11 decks29 decks
Iron Myr
37%inclusion15 decks41 decks
Game Changers
Enlightened Tutor
26%inclusion16 decks61 decks
Vampiric Tutor
24%inclusion6 decks25 decks
Demonic Tutor
24%inclusion6 decks25 decks
Smothering Tithe
21%inclusion13 decks61 decks
The One Ring
18%inclusion11 decks61 decks
Mana Vault
13%inclusion8 decks61 decks
Bolas's Citadel
12%inclusion3 decks25 decks
Mishra's Workshop
10%inclusion6 decks61 decks
Grim Monolith
10%inclusion6 decks61 decks
Ancient Tomb
10%inclusion6 decks61 decks
Creatures
Goblin Engineer
37%inclusion15 decks41 decks
Leaden Myr
36%inclusion9 decks25 decks
Solemn Simulacrum
34%inclusion21 decks61 decks
Goblin Welder
34%inclusion14 decks41 decks
Gold Myr
31%inclusion19 decks61 decks
Esper Sentinel
31%inclusion19 decks61 decks
Dross Scorpion
30%inclusion18 decks61 decks
Academy Manufactor
30%inclusion18 decks61 decks
Junk Diver
28%inclusion17 decks61 decks
Oswald Fiddlebender
28%inclusion17 decks61 decks
Myr Battlesphere
28%inclusion17 decks61 decks
Silver Myr
28%inclusion8 decks29 decks
Sai, Master Thopterist
28%inclusion8 decks29 decks
Reckless Fireweaver
27%inclusion11 decks41 decks
Walking Ballista
25%inclusion15 decks61 decks
Mondrak, Glory Dominus
25%inclusion15 decks61 decks
Padeem, Consul of Innovation
24%inclusion7 decks29 decks
Marionette Master
24%inclusion6 decks25 decks
Baleful Strix
24%inclusion4 decks17 decks
Palladium Myr
23%inclusion14 decks61 decks
Shimmer Myr
21%inclusion13 decks61 decks
Ornithopter of Paradise
21%inclusion13 decks61 decks
Trophy Mage
21%inclusion6 decks29 decks
Spellskite
21%inclusion6 decks29 decks
Thought Monitor
21%inclusion6 decks29 decks
Phyrexian Metamorph
21%inclusion6 decks29 decks
Jhoira, Weatherlight Captain
20%inclusion3 decks15 decks
Kuldotha Forgemaster
20%inclusion12 decks61 decks
Teshar, Ancestor's Apostle
20%inclusion12 decks61 decks
Stridehangar Automaton
20%inclusion10 decks51 decks
Myr Galvanizer
18%inclusion11 decks61 decks
Ethersworn Canonist
18%inclusion11 decks61 decks
Ethersworn Adjudicator
18%inclusion3 decks17 decks
Sharuum the Hegemon
18%inclusion3 decks17 decks
Arcum Dagsson
17%inclusion5 decks29 decks
Sami, Wildcat Captain
17%inclusion5 decks29 decks
Ruin Crab
17%inclusion5 decks29 decks
The Reality Chip
17%inclusion5 decks29 decks
Weftstalker Ardent
17%inclusion5 decks29 decks
Urza, Lord High Artificer
17%inclusion5 decks29 decks
Zirda, the Dawnwaker
17%inclusion7 decks41 decks
Treasure Nabber
17%inclusion7 decks41 decks
Myr Welder
16%inclusion10 decks61 decks
Mirkwood Bats
16%inclusion4 decks25 decks
Jan Jansen, Chaos Crafter
15%inclusion3 decks20 decks
Mayhem Devil
15%inclusion3 decks20 decks
Alloy Myr
15%inclusion9 decks61 decks
Mycosynth Golem
15%inclusion9 decks61 decks
Magda, Brazen Outlaw
15%inclusion6 decks41 decks
Mirran Spy
14%inclusion4 decks29 decks
Instants
Swords to Plowshares
36%inclusion22 decks61 decks
Counterspell
34%inclusion10 decks29 decks
Dispatch
34%inclusion21 decks61 decks
Path to Exile
30%inclusion18 decks61 decks
Whir of Invention
24%inclusion7 decks29 decks
Muddle the Mixture
24%inclusion7 decks29 decks
Boros Charm
22%inclusion9 decks41 decks
Thirst for Knowledge
21%inclusion6 decks29 decks
Dovin's Veto
17%inclusion5 decks29 decks
Deflecting Swat
15%inclusion6 decks41 decks
Disruption Protocol
14%inclusion4 decks29 decks
Swan Song
14%inclusion4 decks29 decks
Arcane Denial
14%inclusion4 decks29 decks
Cyclonic Rift
14%inclusion4 decks29 decks
An Offer You Can't Refuse
14%inclusion4 decks29 decks
Redirect Lightning
12%inclusion3 decks26 decks
Strix Serenade
10%inclusion3 decks29 decks
Rapid Hybridization
10%inclusion3 decks29 decks
Frantic Search
10%inclusion3 decks29 decks
Generous Gift
10%inclusion6 decks61 decks
Clever Concealment
8.2%inclusion5 decks61 decks
Teferi's Protection
8.2%inclusion5 decks61 decks
Deflecting Palm
7.3%inclusion3 decks41 decks
Demand Answers
7.3%inclusion3 decks41 decks
Untimely Malfunction
7.3%inclusion3 decks41 decks
Big Score
7.3%inclusion3 decks41 decks
Chaos Warp
7.3%inclusion3 decks41 decks
Dawn's Truce
6.6%inclusion4 decks61 decks
Flawless Maneuver
6.6%inclusion4 decks61 decks
Sorceries
Wake the Past
22%inclusion9 decks41 decks
Vandalblast
22%inclusion9 decks41 decks
Organic Extinction
18%inclusion11 decks61 decks
Thoughtcast
17%inclusion5 decks29 decks
Blasphemous Act
17%inclusion7 decks41 decks
Sevinne's Reclamation
15%inclusion9 decks61 decks
Forging the Anchor
14%inclusion4 decks29 decks
Reshape
14%inclusion4 decks29 decks
Scrap Mastery
12%inclusion5 decks41 decks
Beseech the Queen
12%inclusion3 decks25 decks
Diabolic Tutor
12%inclusion3 decks25 decks
Transmute Artifact
10%inclusion3 decks29 decks
Jeska's Will
10%inclusion4 decks41 decks
Faithless Looting
10%inclusion4 decks41 decks
Trash for Treasure
7.3%inclusion3 decks41 decks
Wheel of Fortune
7.3%inclusion3 decks41 decks
Austere Command
6.6%inclusion4 decks61 decks
Utility Artifacts
Thopter Foundry
35%inclusion6 decks17 decks
Ichor Wellspring
34%inclusion21 decks61 decks
Staff of Domination
31%inclusion19 decks61 decks
Aether Spellbomb
31%inclusion9 decks29 decks
Blasting Station
30%inclusion18 decks61 decks
Sensei's Divining Top
30%inclusion18 decks61 decks
Transmutation Font
28%inclusion17 decks61 decks
Salvaging Station
26%inclusion16 decks61 decks
Mycosynth Lattice
26%inclusion16 decks61 decks
Rings of Brighthearth
26%inclusion16 decks61 decks
Cloud Key
26%inclusion16 decks61 decks
Myr Turbine
25%inclusion15 decks61 decks
Ugin's Nexus
23%inclusion14 decks61 decks
Mishra's Bauble
23%inclusion14 decks61 decks
Ashnod's Altar
23%inclusion14 decks61 decks
Lightning Greaves
23%inclusion14 decks61 decks
Voltaic Key
21%inclusion13 decks61 decks
Moonsilver Key
20%inclusion12 decks61 decks
Darksteel Forge
20%inclusion12 decks61 decks
Nuka-Cola Vending Machine
20%inclusion12 decks61 decks
Manifold Key
20%inclusion12 decks61 decks
Aetherflux Reservoir
18%inclusion11 decks61 decks
Time Sieve
18%inclusion3 decks17 decks
Encroaching Mycosynth
17%inclusion5 decks29 decks
Repurposing Bay
17%inclusion4 decks24 decks
Semblance Anvil
16%inclusion10 decks61 decks
Expedition Map
16%inclusion10 decks61 decks
Skullclamp
16%inclusion10 decks61 decks
Summoning Station
15%inclusion9 decks61 decks
Sword of the Meek
15%inclusion9 decks61 decks
Mycosynth Wellspring
15%inclusion9 decks61 decks
Soul-Guide Lantern
15%inclusion9 decks61 decks
Mirage Mirror
15%inclusion9 decks61 decks
Idol of Oblivion
15%inclusion9 decks61 decks
Magistrate's Scepter
13%inclusion8 decks61 decks
Servo Schematic
13%inclusion8 decks61 decks
Lithoform Engine
13%inclusion8 decks61 decks
Thousand-Year Elixir
13%inclusion8 decks61 decks
Forsaken Monument
13%inclusion8 decks61 decks
Executioner's Capsule
12%inclusion3 decks25 decks
Retrofitter Foundry
11%inclusion7 decks61 decks
Codex Shredder
11%inclusion7 decks61 decks
Prized Statue
11%inclusion7 decks61 decks
Trading Post
11%inclusion7 decks61 decks
Esoteric Duplicator
10%inclusion3 decks29 decks
Shorikai, Genesis Engine
10%inclusion3 decks29 decks
Myr Matrix
10%inclusion6 decks61 decks
Heartstone
10%inclusion6 decks61 decks
Liquimetal Coating
10%inclusion6 decks61 decks
Mirrorworks
10%inclusion6 decks61 decks
Enchantments
Mystic Remora
28%inclusion8 decks29 decks
Thopter Spy Network
21%inclusion6 decks29 decks
Biotransference
20%inclusion5 decks25 decks
Retreat to Coralhelm
17%inclusion5 decks29 decks
Training Grounds
17%inclusion5 decks29 decks
Anointed Procession
15%inclusion9 decks61 decks
Ghirapur Aether Grid
15%inclusion6 decks41 decks
Artificer's Intuition
14%inclusion4 decks29 decks
Seal of Removal
14%inclusion4 decks29 decks
Mirrodin Besieged
14%inclusion4 decks29 decks
Mechanized Production
14%inclusion4 decks29 decks
Imprisoned in the Moon
14%inclusion4 decks29 decks
Rhystic Study
14%inclusion4 decks29 decks
Agent of the Iron Throne
12%inclusion3 decks25 decks
Revel in Riches
12%inclusion3 decks25 decks
Copy Artifact
10%inclusion3 decks29 decks
Propaganda
10%inclusion3 decks29 decks
Descent into Avernus
7.3%inclusion3 decks41 decks
Impact Tremors
7.3%inclusion3 decks41 decks
Spirit Loop
6.6%inclusion4 decks61 decks
Planeswalkers
Daretti, Scrap Savant
29%inclusion12 decks41 decks
Tezzeret, Cruel Captain
21%inclusion8 decks38 decks
Karn, the Great Creator
20%inclusion12 decks61 decks
Tezzeret, Betrayer of Flesh
10%inclusion3 decks29 decks
Karn, Living Legacy
8.2%inclusion5 decks61 decks
Quintorius, History Chaser
6.7%inclusion1 decks15 decks
Utility Lands
Uthros, Titanic Godcore
47%inclusion7 decks15 decks
Academy Ruins
41%inclusion12 decks29 decks
Inventors' Fair
41%inclusion25 decks61 decks
Buried Ruin
41%inclusion25 decks61 decks
Urza's Saga
33%inclusion20 decks61 decks
Archway of Innovation
21%inclusion6 decks29 decks
Urza's Power Plant
16%inclusion10 decks61 decks
Urza's Mine
16%inclusion10 decks61 decks
Urza's Tower
16%inclusion10 decks61 decks
Reliquary Tower
15%inclusion9 decks61 decks
Adagia, Windswept Bastion
13%inclusion5 decks38 decks
Fomori Vault
11%inclusion7 decks61 decks
Otawara, Soaring City
10%inclusion3 decks29 decks
Cascading Cataracts
8.2%inclusion5 decks61 decks
Rogue's Passage
8.2%inclusion5 decks61 decks
Secluded Starforge
7.9%inclusion3 decks38 decks
Urza's Workshop
6.6%inclusion4 decks61 decks
Monumental Henge
6.6%inclusion4 decks61 decks
Strip Mine
6.6%inclusion4 decks61 decks
Mana Artifacts
Sol Ring
92%inclusion56 decks61 decks
Arcane Signet
54%inclusion33 decks61 decks
Basalt Monolith
38%inclusion23 decks61 decks
Liquimetal Torque
33%inclusion20 decks61 decks
Thran Dynamo
31%inclusion19 decks61 decks
Mind Stone
28%inclusion17 decks61 decks
Azorius Signet
28%inclusion8 decks29 decks
Lotus Petal
26%inclusion16 decks61 decks
Talisman of Conviction
24%inclusion10 decks41 decks
Talisman of Progress
24%inclusion7 decks29 decks
Boros Signet
22%inclusion9 decks41 decks
Mox Opal
21%inclusion13 decks61 decks
Orzhov Signet
20%inclusion5 decks25 decks
Lotus Bloom
18%inclusion11 decks61 decks
Everflowing Chalice
18%inclusion11 decks61 decks
Talisman of Dominance
18%inclusion3 decks17 decks
Chromatic Star
16%inclusion10 decks61 decks
Talisman of Hierarchy
12%inclusion3 decks25 decks
Fellwar Stone
11%inclusion7 decks61 decks
Chromatic Orrery
10%inclusion6 decks61 decks
Patriar's Seal
10%inclusion6 decks61 decks
Mox Amber
10%inclusion6 decks61 decks
Chromatic Lantern
10%inclusion6 decks61 decks
Commander's Sphere
10%inclusion6 decks61 decks
Bender's Waterskin
8.6%inclusion3 decks35 decks
Gilded Lotus
8.2%inclusion5 decks61 decks
Thought Vessel
8.2%inclusion5 decks61 decks
The Eternity Elevator
7.9%inclusion3 decks38 decks
Cursed Mirror
7.3%inclusion3 decks41 decks
Myr Reservoir
6.6%inclusion4 decks61 decks
Slagstone Refinery
6.6%inclusion4 decks61 decks
Victory Chimes
6.6%inclusion4 decks61 decks
Sol Talisman
6.6%inclusion4 decks61 decks
Dreamstone Hedron
6.6%inclusion4 decks61 decks
Hedron Archive
6.6%inclusion4 decks61 decks
Lands
Silverbluff Bridge
87%inclusion13 decks15 decks
Command Tower
74%inclusion45 decks61 decks
Tanglepool Bridge
71%inclusion5 decks7 decks
Drossforge Bridge
70%inclusion14 decks20 decks
Thornglint Bridge
67%inclusion6 decks9 decks
Slagwoods Bridge
67%inclusion6 decks9 decks
Mistvault Bridge
65%inclusion11 decks17 decks
Darkmoss Bridge
63%inclusion5 decks8 decks
Rustvale Bridge
61%inclusion25 decks41 decks
Goldmire Bridge
60%inclusion15 decks25 decks
Razortide Bridge
55%inclusion16 decks29 decks
Power Depot
34%inclusion21 decks61 decks
Sacred Foundry
32%inclusion13 decks41 decks
Deserted Beach
31%inclusion9 decks29 decks
Hallowed Fountain
31%inclusion9 decks29 decks
Exotic Orchard
30%inclusion18 decks61 decks
Adarkar Wastes
28%inclusion8 decks29 decks
Battlefield Forge
27%inclusion11 decks41 decks
The Mycosynth Gardens
26%inclusion16 decks61 decks
Spire of Industry
25%inclusion15 decks61 decks
Clifftop Retreat
24%inclusion10 decks41 decks
Sea of Clouds
21%inclusion6 decks29 decks
Nomad Outpost
20%inclusion4 decks20 decks
Spectator Seating
20%inclusion8 decks41 decks
Azorius Chancery
17%inclusion5 decks29 decks
Skycloud Expanse
17%inclusion5 decks29 decks
Plateau
17%inclusion7 decks41 decks
Urza's Cave
16%inclusion10 decks61 decks
City of Brass
16%inclusion10 decks61 decks
Arid Mesa
16%inclusion10 decks61 decks
Shattered Sanctum
16%inclusion4 decks25 decks
Godless Shrine
16%inclusion4 decks25 decks
Badlands
15%inclusion3 decks20 decks
Savai Triome
15%inclusion3 decks20 decks
Blood Crypt
15%inclusion3 decks20 decks
Sunscorched Divide
15%inclusion6 decks41 decks
Rugged Prairie
15%inclusion6 decks41 decks
Sundown Pass
15%inclusion6 decks41 decks
Sunbillow Verge
14%inclusion5 decks36 decks
Radiant Summit
14%inclusion4 decks29 decks
Glacial Fortress
14%inclusion4 decks29 decks
Glimmervoid
13%inclusion8 decks61 decks
Reflecting Pool
13%inclusion8 decks61 decks
Sunbaked Canyon
12%inclusion5 decks41 decks
Temple of Triumph
12%inclusion5 decks41 decks
Scrubland
12%inclusion3 decks25 decks
Vault of Champions
12%inclusion3 decks25 decks
Mana Confluence
11%inclusion7 decks61 decks
Hengegate Pathway
10%inclusion3 decks29 decks
Temple of Enlightenment
10%inclusion3 decks29 decks