Obscuring Aether + Ugin, the Ineffable + Cloudstone Curio

Obscuring Aether
Ugin, the Ineffable
Cloudstone Curio

Requires
Obscuring Aether must be on the battlefield. Ugin, the Ineffable must be on the battlefield. Cloudstone Curio must be on the battlefield. You control a nontoken creature with morph or megamorph. You have a creature card with morph or megamorph in your hand.
Steps
  1. Cast the creature card with morph or megamorph from your hand for its morph cost by paying 0.
  2. Whenever the face-down creature enters the battlefield, Cloudstone Curio triggers, returning another creature with morph or megamorph to your hand from the battlefield.
  3. Repeat.
Results
Infinite ETB. Infinite LTB. Infinite storm count.

Kadena, Slinking Sorcerer
3.01% of 6270 decks 189 decks
Yarus, Roar of the Old Gods
4.10% of 1585 decks 65 decks
Kaust, Eyes of the Glade
3.18% of 1729 decks 55 decks
Volo, Guide to Monsters
0.26% of 7597 decks 20 decks
Duskana, the Rage Mother
0.14% of 3644 decks 5 decks
Animar, Soul of Elements
0.03% of 16060 decks 5 decks
Chulane, Teller of Tales
0.07% of 7391 decks 5 decks
Vannifar, Evolved Enigma
0.11% of 1769 decks 2 decks
Yedora, Grave Gardener
0.07% of 2928 decks 2 decks
Thrasios, Triton Hero // Vial Smasher the Fierce
0.06% of 3565 decks 2 decks
Kraum, Ludevic's Opus // Sidar Kondo of Jamuraa
1.20% of 83 decks 1 decks
Sisay, Weatherlight Captain
0.01% of 12276 decks 1 decks
Progenitus
0.03% of 3091 decks 1 decks
Sidar Kondo of Jamuraa // Silas Renn, Seeker Adept
0.32% of 308 decks 1 decks
Omnath, Locus of All
0.01% of 13489 decks 1 decks
Kenrith, the Returned King
0.00% of 21799 decks 1 decks
Nikya of the Old Ways
0.04% of 2531 decks 1 decks
Aeve, Progenitor Ooze
0.02% of 4322 decks 1 decks
New Cards
Abhorrent Oculus
73% of 11 decks +69% synergy
Hauntwoods Shrieker
70% of 43 decks +67% synergy
Threats Around Every Corner
61% of 38 decks +58% synergy
Overgrown Zealot
50% of 24 decks +48% synergy
Enduring Innocence
38% of 8 decks +27% synergy
High Synergy Cards
Den Protector
95% of 358 decks +95% synergy
Ainok Survivalist
94% of 358 decks +93% synergy
Willbender
92% of 229 decks +92% synergy
Pyrotechnic Performer
90% of 134 decks +89% synergy
Kadena's Silencer
88% of 229 decks +88% synergy
True Identity
88% of 66 decks +88% synergy
Nantuko Vigilante
88% of 358 decks +87% synergy
Stratus Dancer
87% of 229 decks +87% synergy
Vesuvan Shapeshifter
87% of 229 decks +86% synergy
Kheru Spellsnatcher
85% of 229 decks +85% synergy
Top Cards
Hidden Dragonslayer
85% of 71 decks +84% synergy
Ugin's Mastery
84% of 290 decks +84% synergy
Boltbender
84% of 134 decks +84% synergy
Panoptic Projektor
84% of 236 decks +84% synergy
Akroma, Angel of Fury
82% of 138 decks +81% synergy
Veiled Ascension
80% of 66 decks +80% synergy
Bane of the Living
80% of 196 decks +80% synergy
Ixidron
79% of 229 decks +79% synergy
Icefeather Aven
79% of 229 decks +78% synergy
Yedora, Grave Gardener
78% of 351 decks +77% synergy
Creatures
Printlifter Ooze
78% of 236 decks +77% synergy
Unyielding Gatekeeper
75% of 67 decks +74% synergy
Grim Haruspex
73% of 196 decks +69% synergy
Chromeshell Crab
73% of 229 decks +73% synergy
Deathmist Raptor
73% of 358 decks +72% synergy
Experiment Twelve
72% of 236 decks +71% synergy
Brine Elemental
71% of 229 decks +71% synergy
Silumgar Assassin
70% of 196 decks +70% synergy
Ashcloud Phoenix
67% of 138 decks +66% synergy
Rattleclaw Mystic
67% of 12 decks +63% synergy
Vannifar, Evolved Enigma
65% of 120 decks +64% synergy
Voidmage Apprentice
65% of 229 decks +64% synergy
Duskana, the Rage Mother
64% of 64 decks +63% synergy
Whisperwood Elemental
61% of 358 decks +61% synergy
Mischievous Quanar
59% of 229 decks +59% synergy
Thousand Winds
59% of 229 decks +59% synergy
Beast Whisperer
59% of 358 decks +47% synergy
Seedborn Muse
57% of 358 decks +49% synergy
Welcoming Vampire
56% of 71 decks +51% synergy
Roshan, Hidden Magister
54% of 37 decks +52% synergy
Aurelia's Vindicator
53% of 68 decks +53% synergy
Master of Pearls
51% of 71 decks +51% synergy
Essence of Antiquity
48% of 67 decks +47% synergy
Ixidor, Reality Sculptor
48% of 229 decks +47% synergy
Exit Specialist
47% of 112 decks +47% synergy
Hooded Hydra
47% of 358 decks +46% synergy
Yarus, Roar of the Old Gods
46% of 134 decks +46% synergy
Thieving Amalgam
45% of 196 decks +45% synergy
Echo Tracer
45% of 229 decks +44% synergy
Curator Beastie
44% of 36 decks +42% synergy
Jeering Instigator
44% of 138 decks +44% synergy
Jasmine Boreal of the Seven
44% of 71 decks +44% synergy
Skinthinner
42% of 196 decks +42% synergy
Salt Road Ambushers
40% of 358 decks +40% synergy
Temur Sabertooth
39% of 358 decks +36% synergy
Nervous Gardener
37% of 239 decks +36% synergy
Aphetto Runecaster
37% of 229 decks +37% synergy
Noble Hierarch
36% of 11 decks +20% synergy
Glitch Interpreter
36% of 25 decks +34% synergy
Greenbelt Radical
36% of 238 decks +35% synergy
Kozilek, the Broken Reality
36% of 87 decks +34% synergy
Etrata, Deadly Fugitive
35% of 93 decks +34% synergy
Sidar Kondo of Jamuraa
35% of 71 decks +35% synergy
Flourishing Bloom-Kin
34% of 238 decks +34% synergy
Animar, Soul of Elements
33% of 12 decks +29% synergy
Liberator, Urza's Battlethopter
33% of 318 decks +31% synergy
Temur War Shaman
32% of 358 decks +32% synergy
Thelonite Hermit
32% of 358 decks +32% synergy
Fortune Thief
32% of 138 decks +32% synergy
Grazilaxx, Illithid Scholar
32% of 214 decks +29% synergy
Instants
Unexplained Absence
64% of 66 decks +63% synergy
Path to Exile
61% of 71 decks +15% synergy
Expose the Culprit
52% of 135 decks +52% synergy
Showstopping Surprise
50% of 134 decks +50% synergy
Swords to Plowshares
48% of 71 decks -15% synergy
Reality Shift
48% of 229 decks +39% synergy
Heroic Intervention
41% of 358 decks +11% synergy
Chaos Warp
38% of 138 decks +6% synergy
Beast Within
35% of 358 decks -4% synergy
Cyclonic Rift
34% of 229 decks +7% synergy
Become Anonymous
30% of 37 decks +29% synergy
Teferi's Protection
25% of 71 decks +5% synergy
Assassin's Trophy
25% of 196 decks -5% synergy
Sudden Substitution
21% of 229 decks +20% synergy
Fierce Guardianship
19% of 225 decks +1% synergy
Putrefy
18% of 196 decks +2% synergy
Counterspell
18% of 229 decks -25% synergy
Vampiric Tutor
18% of 196 decks -0% synergy
Arcane Denial
17% of 229 decks -2% synergy
Cyber Conversion
17% of 129 decks +16% synergy
Worldly Tutor
16% of 358 decks +2% synergy
Sultai Charm
16% of 196 decks +11% synergy
Akroma's Will
15% of 71 decks +6% synergy
Deflecting Swat
15% of 138 decks -1% synergy
Revitalizing Repast
15% of 40 decks +3% synergy
Generous Gift
14% of 71 decks -11% synergy
Mana Drain
14% of 229 decks -2% synergy
Deadly Rollick
13% of 192 decks +2% synergy
Sink into Stupor
13% of 47 decks -0% synergy
Growth Spiral
13% of 229 decks -9% synergy
Break Down the Door
12% of 24 decks +11% synergy
Great Train Heist
12% of 40 decks +8% synergy
Return of the Wildspeaker
12% of 356 decks -1% synergy
An Offer You Can't Refuse
12% of 200 decks -9% synergy
Valakut Awakening
9% of 138 decks +3% synergy
Backslide
9% of 229 decks +9% synergy
Biomass Mutation
9% of 229 decks +8% synergy
Rapid Hybridization
9% of 229 decks -0% synergy
Congregation at Dawn
8% of 71 decks +7% synergy
Enlightened Tutor
8% of 71 decks -9% synergy
Swan Song
8% of 229 decks -8% synergy
Archdruid's Charm
8% of 239 decks +1% synergy
Fell the Profane
8% of 40 decks -4% synergy
Flawless Maneuver
7% of 71 decks -3% synergy
Leadership Vacuum
7% of 229 decks +7% synergy
Golgari Charm
7% of 196 decks +1% synergy
Negate
7% of 229 decks -16% synergy
Boros Charm
6% of 65 decks -19% synergy
Abrade
6% of 138 decks -6% synergy
Eladamri's Call
6% of 71 decks -5% synergy
Sorceries
Hide in Plain Sight
63% of 175 decks +62% synergy
Nature's Lore
51% of 358 decks +19% synergy
Ghastly Conscription
49% of 196 decks +49% synergy
Austere Command
46% of 71 decks +34% synergy
Three Visits
46% of 358 decks +21% synergy
Farseek
40% of 358 decks +6% synergy
Blasphemous Act
38% of 138 decks +4% synergy
Valgavoth's Onslaught
33% of 24 decks +31% synergy
Cultivate
32% of 358 decks -14% synergy
Jeska's Will
30% of 138 decks +12% synergy
Dusk // Dawn
28% of 71 decks +25% synergy
Rampant Growth
27% of 358 decks -8% synergy
Fell the Mighty
27% of 71 decks +24% synergy
Stump Stomp
23% of 35 decks +14% synergy
Demonic Tutor
20% of 196 decks -2% synergy
All Is Dust
20% of 358 decks +18% synergy
Kodama's Reach
18% of 358 decks -14% synergy
Under the Skin
17% of 36 decks +15% synergy
Decimate
17% of 138 decks +8% synergy
Overwhelming Stampede
12% of 358 decks +7% synergy
Bala Ged Recovery
11% of 352 decks +2% synergy
Chain Reaction
9% of 138 decks +5% synergy
Shamanic Revelation
8% of 358 decks -1% synergy
Triumph of the Hordes
8% of 358 decks +4% synergy
Titanic Ultimatum
8% of 65 decks +5% synergy
Villainous Wealth
8% of 196 decks -1% synergy
Toxic Deluge
8% of 196 decks -10% synergy
Bridgeworks Battle
8% of 79 decks +2% synergy
Mythos of Brokkos
7% of 191 decks +6% synergy
Retribution of the Meek
7% of 71 decks +7% synergy
Farewell
7% of 71 decks -6% synergy
Road of Return
7% of 358 decks +6% synergy
Wildcall
6% of 358 decks +6% synergy
Diabolic Tutor
6% of 196 decks -0% synergy
Gamble
6% of 138 decks -4% synergy
Damnation
5% of 196 decks -3% synergy
Primal Growth
5% of 358 decks +4% synergy
Utility Artifacts
Scroll of Fate
75% of 358 decks +74% synergy
Dream Chisel
72% of 358 decks +72% synergy
Forsaken Monument
35% of 352 decks +33% synergy
Mystic Forge
33% of 358 decks +30% synergy
Ashnod's Altar
27% of 358 decks +19% synergy
Semblance Anvil
25% of 358 decks +25% synergy
Crystal Shard
24% of 229 decks +23% synergy
Vedalken Orrery
23% of 358 decks +22% synergy
Cloud Key
23% of 358 decks +21% synergy
Lightning Greaves
21% of 358 decks -4% synergy
Cryptic Coat
19% of 112 decks +18% synergy
Strionic Resonator
15% of 358 decks +12% synergy
Phyrexian Altar
15% of 358 decks +11% synergy
Swiftfoot Boots
13% of 358 decks -15% synergy
Lifecrafter's Bestiary
12% of 358 decks +8% synergy
The Great Henge
11% of 356 decks +1% synergy
Sensei's Divining Top
8% of 358 decks +3% synergy
Helm of Awakening
7% of 358 decks +6% synergy
Symmetry Matrix
7% of 318 decks +7% synergy
Altar of Dementia
7% of 358 decks +4% synergy
Blasting Station
6% of 358 decks +6% synergy
Battlemage's Bracers
5% of 138 decks +4% synergy
Enchantments
Secret Plans
76% of 229 decks +76% synergy
Trail of Mystery
75% of 358 decks +74% synergy
Primordial Mist
72% of 229 decks +72% synergy
Gift of Doom
72% of 196 decks +72% synergy
Mastery of the Unseen
69% of 71 decks +69% synergy
They Came from the Pipes
68% of 25 decks +65% synergy
Leyline of Anticipation
61% of 229 decks +57% synergy
Rhythm of the Wild
49% of 138 decks +25% synergy
Guardian Project
42% of 358 decks +33% synergy
Goblin Bombardment
39% of 138 decks +33% synergy
Wilderness Reclamation
35% of 358 decks +31% synergy
Elven Chorus
33% of 292 decks +28% synergy
Equilibrium
31% of 229 decks +31% synergy
Assemble the Players
25% of 67 decks +24% synergy
Heartless Summoning
24% of 196 decks +24% synergy
Rhystic Study
21% of 229 decks -6% synergy
Growing Rites of Itlimoc
21% of 358 decks +15% synergy
Growing Dread
20% of 25 decks +17% synergy
Impact Tremors
20% of 138 decks +10% synergy
Shadow in the Warp
19% of 138 decks +15% synergy
Words of Wind
16% of 229 decks +16% synergy
Tocasia's Welcome
15% of 71 decks +11% synergy
Muraganda Petroglyphs
14% of 358 decks +14% synergy
Mirari's Wake
14% of 71 decks +0% synergy
Experimental Lab // Staff Room
14% of 36 decks +12% synergy
Beastmaster Ascension
13% of 358 decks +7% synergy
Smothering Tithe
13% of 71 decks -12% synergy
Sylvan Library
13% of 358 decks +1% synergy
Cryptolith Rite
12% of 358 decks +9% synergy
Break Through the Line
12% of 138 decks +11% synergy
Death in Heaven
12% of 104 decks +11% synergy
Evolutionary Leap
10% of 358 decks +9% synergy
Communal Brewing
10% of 49 decks +7% synergy
Mystic Remora
9% of 229 decks -9% synergy
Tribute to the World Tree
9% of 298 decks +1% synergy
Wild Growth
9% of 358 decks -2% synergy
Teferi's Ageless Insight
7% of 223 decks +2% synergy
Utopia Sprawl
6% of 358 decks -2% synergy
Rageform
6% of 138 decks +6% synergy
Exploration
6% of 358 decks -3% synergy
Zendikar Resurgent
5% of 358 decks +3% synergy
Planeswalkers
Vivien, Champion of the Wilds
43% of 358 decks +42% synergy
Utility Lands
Zoetic Cavern
73% of 358 decks +73% synergy
Branch of Vitu-Ghazi
73% of 248 decks +72% synergy
Alchemist's Refuge
54% of 229 decks +47% synergy
Reliquary Tower
51% of 358 decks +22% synergy
Bojuka Bog
46% of 196 decks +16% synergy
Kessig Wolf Run
46% of 138 decks +31% synergy
Shrine of the Forsaken Gods
33% of 358 decks +32% synergy
Tomb of the Spirit Dragon
31% of 358 decks +30% synergy
Yavimaya, Cradle of Growth
30% of 344 decks +21% synergy
Temple of the False God
24% of 358 decks +15% synergy
Boseiju, Who Endures
23% of 333 decks +3% synergy
Otawara, Soaring City
16% of 204 decks -1% synergy
Ancient Tomb
15% of 358 decks +5% synergy
Urborg, Tomb of Yawgmoth
12% of 358 decks +3% synergy
Takenuma, Abandoned Mire
11% of 171 decks +1% synergy
Mosswort Bridge
10% of 358 decks -0% synergy
Winding Canyons
9% of 358 decks +9% synergy
Restless Vinestalk
9% of 130 decks +6% synergy
Thespian's Stage
9% of 358 decks +6% synergy
Riptide Laboratory
9% of 229 decks +7% synergy
Novijen, Heart of Progress
7% of 229 decks +6% synergy
High Market
7% of 358 decks +4% synergy
Lumbering Falls
7% of 229 decks +5% synergy
Rogue's Passage
7% of 358 decks -13% synergy
Homeward Path
6% of 358 decks +4% synergy
Diamond City
6% of 104 decks +5% synergy
Gavony Township
6% of 71 decks -4% synergy
Ruins of Oran-Rief
6% of 358 decks +5% synergy
Gaea's Cradle
6% of 358 decks -0% synergy
Castle Garenbrig
5% of 356 decks +0% synergy
Cabal Coffers
5% of 196 decks -6% synergy
Mana Artifacts
Sol Ring
91% of 358 decks +7% synergy
Arcane Signet
76% of 356 decks +4% synergy
Talisman of Curiosity
29% of 229 decks +17% synergy
Simic Signet
24% of 229 decks +10% synergy
Talisman of Resilience
20% of 196 decks +9% synergy
Talisman of Dominance
19% of 196 decks -12% synergy
Thought Vessel
17% of 358 decks -0% synergy
Talisman of Impulse
15% of 138 decks +6% synergy
Gruul Signet
15% of 138 decks +3% synergy
Golgari Signet
14% of 196 decks +1% synergy
Dimir Signet
14% of 196 decks -16% synergy
Talisman of Conviction
12% of 65 decks -11% synergy
Thran Dynamo
12% of 358 decks +7% synergy
Fellwar Stone
11% of 358 decks -10% synergy
Talisman of Unity
10% of 71 decks +2% synergy
Selesnya Signet
10% of 71 decks +1% synergy
Boros Signet
8% of 65 decks -16% synergy
Chromatic Lantern
8% of 358 decks -2% synergy
Decanter of Endless Water
7% of 325 decks +3% synergy
Mana Crypt
7% of 358 decks -1% synergy
Commander's Sphere
5% of 358 decks -10% synergy
Lands
Command Tower
95% of 358 decks +21% synergy
Cinder Glade
64% of 138 decks +25% synergy
Canopy Vista
61% of 71 decks +24% synergy
Overgrown Tomb
60% of 196 decks +18% synergy
Watery Grave
60% of 196 decks +19% synergy
Stomping Ground
59% of 138 decks +18% synergy
Temple Garden
58% of 71 decks +17% synergy
Breeding Pool
58% of 229 decks +17% synergy
Zagoth Triome
56% of 191 decks +25% synergy
Spara's Headquarters
55% of 11 decks +23% synergy
Hallowed Fountain
55% of 11 decks +14% synergy
Sacred Foundry
52% of 65 decks +16% synergy
Jungle Shrine
51% of 65 decks +19% synergy
Yavimaya Coast
51% of 229 decks +24% synergy
Exotic Orchard
49% of 358 decks +13% synergy
Rejuvenating Springs
48% of 223 decks +19% synergy
Opulent Palace
47% of 196 decks +20% synergy
Llanowar Wastes
46% of 196 decks +21% synergy
Hinterland Harbor
44% of 229 decks +16% synergy
Rootbound Crag
43% of 138 decks +20% synergy
Furycalm Snarl
43% of 65 decks +30% synergy
Rockfall Vale
42% of 138 decks +20% synergy
Frontier Bivouac
42% of 12 decks +14% synergy
Ketria Triome
42% of 12 decks +9% synergy
Jetmir's Garden
42% of 65 decks +9% synergy
Spire Garden
41% of 138 decks +17% synergy
Fortified Village
41% of 71 decks +26% synergy
Game Trail
41% of 138 decks +25% synergy
Sunken Hollow
40% of 196 decks +6% synergy
Sea of Clouds
36% of 11 decks +10% synergy
Seaside Citadel
36% of 11 decks +10% synergy
Undergrowth Stadium
35% of 190 decks +9% synergy
Sungrass Prairie
35% of 71 decks +23% synergy
Dreamroot Cascade
35% of 207 decks +16% synergy
Morphic Pool
35% of 196 decks +9% synergy
Bountiful Promenade
34% of 71 decks +10% synergy
Woodland Cemetery
34% of 196 decks +6% synergy
Steam Vents
33% of 12 decks -6% synergy
Temple of Triumph
32% of 65 decks +16% synergy
Sheltered Thicket
29% of 138 decks +21% synergy
Simic Growth Chamber
29% of 229 decks +9% synergy
Drowned Catacomb
29% of 196 decks +3% synergy
Scattered Groves
28% of 71 decks +20% synergy
Temple of Plenty
28% of 71 decks +15% synergy
Spectator Seating
28% of 65 decks +3% synergy
Misty Rainforest
28% of 358 decks +16% synergy
Temple of Abandon
28% of 138 decks +14% synergy
Gruul Turf
28% of 138 decks +12% synergy
Karplusan Forest
28% of 138 decks +11% synergy
Glacial Fortress
27% of 11 decks +2% synergy