Urza, Lord High Artificer
Corridor Monitor
Retraction Helix
Sapphire Medallion

   Prerequisites

What do I need to start this combo?
Urza and Sapphire Medallion on the battlefield.
Corridor Monitor and Retraction Helix in hand.
You control a creature that doesn't have summoning sickness.
available

   Steps

How does this combo work?
1
Cast Retraction Helix by paying , targeting a creature you control that doesn't have summoning sickness.
2
Cast Corridor Monitor by paying due to Sapphire Medallion.
3
When Corridor Monitor enters, it triggers, untapping the creature targeted by Retraction Helix.
4
Activate Urza's first ability by tapping Corridor Monitor, adding .
5
Activate the creature targeted by Retraction Helix by tapping it, returning Corridor Monitor from the battlefield to your hand.
6
Repeat from step 2.

   Results

What do I get from this combo?
Infinite ETB
Infinite LTB
Infinite storm count
Urza, Lord High Artificer
0.1%inclusion10 decks18.6K decks
Emry, Lurker of the Loch
0.0%inclusion1 decks5.90K decks
Jin-Gitaxias
0.0%inclusion1 decks3.48K decks
Arcum Dagsson
0.0%inclusion1 decks2.50K decks
New Cards
Sewer-veillance Cam
100%inclusion2 decks2 decks
96%synergy
Chrome Dome
50%inclusion1 decks2 decks
48%synergy
High Synergy Cards
Forensic Gadgeteer
85%inclusion11 decks13 decks
74%synergy
Spellskite
85%inclusion11 decks13 decks
74%synergy
Manifold Key
77%inclusion10 decks13 decks
70%synergy
Valley Floodcaller
69%inclusion9 decks13 decks
65%synergy
Voltaic Key
69%inclusion9 decks13 decks
64%synergy
Rings of Brighthearth
69%inclusion9 decks13 decks
63%synergy
Sensei's Divining Top
77%inclusion10 decks13 decks
62%synergy
Aether Spellbomb
69%inclusion9 decks13 decks
61%synergy
Battered Golem
62%inclusion8 decks13 decks
61%synergy
Flusterstorm
69%inclusion9 decks13 decks
60%synergy
Top Cards
Mystic Remora
77%inclusion10 decks13 decks
50%synergy
The Reality Chip
69%inclusion9 decks13 decks
57%synergy
Etherium Sculptor
69%inclusion9 decks13 decks
52%synergy
Isochron Scepter
69%inclusion9 decks13 decks
52%synergy
Dramatic Reversal
69%inclusion9 decks13 decks
50%synergy
Hullbreaker Horror
69%inclusion9 decks13 decks
44%synergy
Imposter Mech
62%inclusion8 decks13 decks
58%synergy
Codex Shredder
62%inclusion8 decks13 decks
56%synergy
Mental Misstep
62%inclusion8 decks13 decks
55%synergy
Reshape
62%inclusion8 decks13 decks
55%synergy
Game Changers
Mana Vault
69%inclusion9 decks13 decks
59%synergy
The One Ring
69%inclusion9 decks13 decks
57%synergy
Ancient Tomb
54%inclusion7 decks13 decks
42%synergy
Grim Monolith
46%inclusion6 decks13 decks
41%synergy
Mox Diamond
46%inclusion6 decks13 decks
40%synergy
Force of Will
46%inclusion6 decks13 decks
29%synergy
Fierce Guardianship
46%inclusion6 decks13 decks
23%synergy
Rhystic Study
46%inclusion6 decks13 decks
14%synergy
Chrome Mox
38%inclusion5 decks13 decks
29%synergy
Mishra's Workshop
23%inclusion3 decks13 decks
21%synergy
Creatures
Phyrexian Metamorph
62%inclusion8 decks13 decks
42%synergy
Hydroelectric Specimen
54%inclusion7 decks13 decks
40%synergy
Displacer Kitten
46%inclusion6 decks13 decks
36%synergy
Sai, Master Thopterist
46%inclusion6 decks13 decks
34%synergy
Liberator, Urza's Battlethopter
38%inclusion5 decks13 decks
33%synergy
Glaring Fleshraker
31%inclusion4 decks13 decks
29%synergy
Mockingbird
31%inclusion4 decks13 decks
27%synergy
Chrome Host Seedshark
31%inclusion4 decks13 decks
27%synergy
Walking Ballista
31%inclusion4 decks13 decks
25%synergy
Ornithopter
31%inclusion4 decks13 decks
22%synergy
Thought Monitor
31%inclusion4 decks13 decks
20%synergy
Faerie Mastermind
31%inclusion4 decks13 decks
16%synergy
Pili-Pala
23%inclusion3 decks13 decks
21%synergy
Drafna, Founder of Lat-Nam
23%inclusion3 decks13 decks
21%synergy
Volatile Stormdrake
23%inclusion3 decks13 decks
20%synergy
Hangarback Walker
23%inclusion3 decks13 decks
20%synergy
Scrap Trawler
23%inclusion3 decks13 decks
19%synergy
Myr Retriever
23%inclusion3 decks13 decks
19%synergy
Unctus, Grand Metatect
23%inclusion3 decks13 decks
17%synergy
High Fae Trickster
23%inclusion3 decks13 decks
17%synergy
Vedalken Archmage
23%inclusion3 decks13 decks
17%synergy
Ornithopter of Paradise
23%inclusion3 decks13 decks
13%synergy
Emry, Lurker of the Loch
23%inclusion3 decks13 decks
11%synergy
Instants
Sink into Stupor
62%inclusion8 decks13 decks
40%synergy
Banishing Knack
54%inclusion7 decks13 decks
52%synergy
Force of Negation
54%inclusion7 decks13 decks
39%synergy
Muddle the Mixture
54%inclusion7 decks13 decks
38%synergy
Swan Song
54%inclusion7 decks13 decks
27%synergy
An Offer You Can't Refuse
54%inclusion7 decks13 decks
16%synergy
Chain of Vapor
46%inclusion6 decks13 decks
41%synergy
Mindbreak Trap
46%inclusion6 decks13 decks
40%synergy
Borne Upon a Wind
38%inclusion5 decks13 decks
34%synergy
Pact of Negation
38%inclusion5 decks13 decks
29%synergy
Whir of Invention
38%inclusion5 decks13 decks
26%synergy
Mana Drain
38%inclusion5 decks13 decks
12%synergy
Cyclonic Rift
38%inclusion5 decks13 decks
6%synergy
Into the Flood Maw
31%inclusion4 decks13 decks
24%synergy
Spell Pierce
31%inclusion4 decks13 decks
23%synergy
Mystical Tutor
31%inclusion4 decks13 decks
8%synergy
Commandeer
23%inclusion3 decks13 decks
18%synergy
Resculpt
23%inclusion3 decks13 decks
6%synergy
Snap
23%inclusion3 decks13 decks
4%synergy
Pongify
23%inclusion3 decks13 decks
-17%synergy
Brainstorm
23%inclusion3 decks13 decks
-18%synergy
High Tide
23%inclusion3 decks13 decks
-21%synergy
Counterspell
23%inclusion3 decks13 decks
-43%synergy
Sorceries
Fabricate
62%inclusion8 decks13 decks
40%synergy
Merchant Scroll
38%inclusion5 decks13 decks
30%synergy
Transmute Artifact
31%inclusion4 decks13 decks
27%synergy
Sea Gate Restoration
31%inclusion4 decks13 decks
16%synergy
Timetwister
23%inclusion3 decks13 decks
21%synergy
Solve the Equation
23%inclusion3 decks13 decks
11%synergy
Utility Artifacts
Mishra's Bauble
54%inclusion7 decks13 decks
44%synergy
Unwinding Clock
54%inclusion7 decks13 decks
42%synergy
Urza's Bauble
46%inclusion6 decks13 decks
41%synergy
Tormod's Crypt
46%inclusion6 decks13 decks
37%synergy
Uthros Research Craft
43%inclusion3 decks7 decks
36%synergy
Repurposing Bay
38%inclusion5 decks13 decks
35%synergy
Sculpting Steel
38%inclusion5 decks13 decks
31%synergy
Mystic Forge
38%inclusion5 decks13 decks
29%synergy
Genesis Chamber
23%inclusion3 decks13 decks
23%synergy
Defense Grid
23%inclusion3 decks13 decks
22%synergy
Prized Statue
23%inclusion3 decks13 decks
22%synergy
Krark-Clan Ironworks
23%inclusion3 decks13 decks
21%synergy
Mirage Mirror
23%inclusion3 decks13 decks
20%synergy
Skullclamp
23%inclusion3 decks13 decks
17%synergy
Cloud Key
23%inclusion3 decks13 decks
16%synergy
Lightning Greaves
23%inclusion3 decks13 decks
-3%synergy
Enchantments
Copy Artifact
38%inclusion5 decks13 decks
35%synergy
Steal Enchantment
31%inclusion4 decks13 decks
30%synergy
Mirrormade
31%inclusion4 decks13 decks
25%synergy
Training Grounds
31%inclusion4 decks13 decks
24%synergy
Intruder Alarm
23%inclusion3 decks13 decks
20%synergy
Amphibian Downpour
23%inclusion3 decks13 decks
17%synergy
Leyline of Anticipation
23%inclusion3 decks13 decks
14%synergy
Planeswalkers
Tezzeret the Seeker
54%inclusion7 decks13 decks
45%synergy
Tezzeret, Cruel Captain
43%inclusion3 decks7 decks
36%synergy
Utility Lands
Urza's Saga
69%inclusion9 decks13 decks
52%synergy
Seat of the Synod
62%inclusion8 decks13 decks
43%synergy
City of Traitors
54%inclusion7 decks13 decks
52%synergy
Otawara, Soaring City
54%inclusion7 decks13 decks
28%synergy
Cephalid Coliseum
46%inclusion6 decks13 decks
37%synergy
Uthros, Titanic Godcore
43%inclusion3 decks7 decks
33%synergy
Crystal Vein
38%inclusion5 decks13 decks
36%synergy
Minamo, School at Water's Edge
38%inclusion5 decks13 decks
26%synergy
Inventors' Fair
38%inclusion5 decks13 decks
25%synergy
Academy Ruins
38%inclusion5 decks13 decks
20%synergy
Saprazzan Skerry
23%inclusion3 decks13 decks
20%synergy
Emergence Zone
23%inclusion3 decks13 decks
19%synergy
Darksteel Citadel
23%inclusion3 decks13 decks
12%synergy
Mana Artifacts
Sol Ring
100%inclusion13 decks13 decks
15%synergy
Arcane Signet
92%inclusion12 decks13 decks
27%synergy
Basalt Monolith
85%inclusion11 decks13 decks
74%synergy
Lotus Petal
77%inclusion10 decks13 decks
65%synergy
Jeweled Amulet
54%inclusion7 decks13 decks
51%synergy
Mox Opal
54%inclusion7 decks13 decks
44%synergy
Everflowing Chalice
46%inclusion6 decks13 decks
30%synergy
Fellwar Stone
46%inclusion6 decks13 decks
26%synergy
Liquimetal Torque
38%inclusion5 decks13 decks
32%synergy
Springleaf Drum
31%inclusion4 decks13 decks
27%synergy
Mind Stone
31%inclusion4 decks13 decks
-4%synergy
Relic of Legends
23%inclusion3 decks13 decks
21%synergy
Lands
Flooded Strand
54%inclusion7 decks13 decks
46%synergy
Gemstone Caverns
46%inclusion6 decks13 decks
40%synergy
Scalding Tarn
46%inclusion6 decks13 decks
39%synergy
Polluted Delta
46%inclusion6 decks13 decks
38%synergy
Prismatic Vista
31%inclusion4 decks13 decks
26%synergy
Misty Rainforest
31%inclusion4 decks13 decks
23%synergy
Talon Gates of Madara
23%inclusion3 decks13 decks
20%synergy