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
3.11% of 6165 decks 192 decks
Yarus, Roar of the Old Gods
4.41% of 1429 decks 63 decks
Kaust, Eyes of the Glade
3.34% of 1618 decks 54 decks
Volo, Guide to Monsters
0.25% of 7559 decks 19 decks
Chulane, Teller of Tales
0.07% of 7367 decks 5 decks
Animar, Soul of Elements
0.03% of 15933 decks 5 decks
Duskana, the Rage Mother
0.15% of 3410 decks 5 decks
Vannifar, Evolved Enigma
0.12% of 1671 decks 2 decks
Yedora, Grave Gardener
0.07% of 2907 decks 2 decks
Thrasios, Triton Hero // Vial Smasher the Fierce
0.06% of 3530 decks 2 decks
Progenitus
0.04% of 2795 decks 1 decks
Azlask, the Swelling Scourge
0.02% of 5608 decks 1 decks
Sidar Kondo of Jamuraa // Silas Renn, Seeker Adept
0.33% of 304 decks 1 decks
Kenrith, the Returned King
0.00% of 21550 decks 1 decks
Omnath, Locus of All
0.01% of 12912 decks 1 decks
Kraum, Ludevic's Opus // Sidar Kondo of Jamuraa
1.23% of 81 decks 1 decks
Aeve, Progenitor Ooze
0.02% of 4205 decks 1 decks
Sisay, Weatherlight Captain
0.01% of 12157 decks 1 decks
New Cards
Abhorrent Oculus
86% of 7 decks +80% synergy
They Came from the Pipes
76% of 21 decks +71% synergy
Threats Around Every Corner
70% of 30 decks +66% synergy
Hauntwoods Shrieker
67% of 33 decks +64% synergy
Overgrown Zealot
53% of 15 decks +50% synergy
High Synergy Cards
Den Protector
96% of 357 decks +95% synergy
Ainok Survivalist
94% of 357 decks +93% synergy
Willbender
92% of 232 decks +92% synergy
Kadena's Silencer
89% of 232 decks +89% synergy
Pyrotechnic Performer
89% of 131 decks +88% synergy
Stratus Dancer
88% of 232 decks +88% synergy
Vesuvan Shapeshifter
88% of 232 decks +88% synergy
Nantuko Vigilante
88% of 357 decks +88% synergy
True Identity
88% of 66 decks +88% synergy
Ugin's Mastery
85% of 283 decks +84% synergy
Top Cards
Kheru Spellsnatcher
85% of 232 decks +84% synergy
Boltbender
85% of 131 decks +84% synergy
Panoptic Projektor
85% of 228 decks +84% synergy
Hidden Dragonslayer
85% of 71 decks +84% synergy
Bane of the Living
82% of 200 decks +81% synergy
Akroma, Angel of Fury
81% of 135 decks +80% synergy
Ixidron
81% of 232 decks +80% synergy
Veiled Ascension
80% of 66 decks +80% synergy
Icefeather Aven
80% of 232 decks +80% synergy
Printlifter Ooze
79% of 228 decks +78% synergy
Creatures
Yedora, Grave Gardener
78% of 349 decks +77% synergy
Unyielding Gatekeeper
75% of 67 decks +74% synergy
Grim Haruspex
74% of 200 decks +70% synergy
Chromeshell Crab
74% of 232 decks +73% synergy
Experiment Twelve
73% of 228 decks +72% synergy
Deathmist Raptor
72% of 357 decks +72% synergy
Brine Elemental
72% of 232 decks +71% synergy
Silumgar Assassin
70% of 200 decks +70% synergy
Vannifar, Evolved Enigma
67% of 117 decks +66% synergy
Ashcloud Phoenix
66% of 135 decks +66% synergy
Voidmage Apprentice
66% of 232 decks +65% synergy
Duskana, the Rage Mother
64% of 64 decks +63% synergy
Rattleclaw Mystic
62% of 13 decks +58% synergy
Whisperwood Elemental
61% of 357 decks +61% synergy
Mischievous Quanar
60% of 232 decks +60% synergy
Thousand Winds
59% of 232 decks +59% synergy
Seedborn Muse
59% of 357 decks +51% synergy
Roshan, Hidden Magister
59% of 34 decks +57% synergy
Beast Whisperer
59% of 357 decks +47% synergy
Welcoming Vampire
56% of 71 decks +51% synergy
Aurelia's Vindicator
53% of 68 decks +53% synergy
Master of Pearls
49% of 71 decks +49% synergy
Exit Specialist
48% of 108 decks +48% synergy
Essence of Antiquity
48% of 67 decks +47% synergy
Glitch Interpreter
48% of 21 decks +45% synergy
Ixidor, Reality Sculptor
47% of 232 decks +47% synergy
Yarus, Roar of the Old Gods
47% of 131 decks +46% synergy
Echo Tracer
46% of 232 decks +46% synergy
Thieving Amalgam
46% of 200 decks +45% synergy
Hooded Hydra
46% of 357 decks +45% synergy
Jeering Instigator
44% of 135 decks +44% synergy
Jasmine Boreal of the Seven
44% of 71 decks +44% synergy
Curator Beastie
43% of 28 decks +39% synergy
Skinthinner
40% of 200 decks +40% synergy
Temur Sabertooth
39% of 357 decks +35% synergy
Salt Road Ambushers
39% of 357 decks +38% synergy
Etrata, Deadly Fugitive
37% of 91 decks +36% synergy
Kozilek, the Broken Reality
37% of 79 decks +35% synergy
Nervous Gardener
36% of 231 decks +36% synergy
Greenbelt Radical
36% of 230 decks +35% synergy
Aphetto Runecaster
35% of 232 decks +35% synergy
Liberator, Urza's Battlethopter
34% of 312 decks +32% synergy
Flourishing Bloom-Kin
34% of 230 decks +33% synergy
Sidar Kondo of Jamuraa
34% of 71 decks +33% synergy
Noble Hierarch
33% of 12 decks +17% synergy
Teferi, Mage of Zhalfir
33% of 232 decks +32% synergy
Temur War Shaman
32% of 357 decks +32% synergy
Grazilaxx, Illithid Scholar
32% of 216 decks +30% synergy
Thelonite Hermit
32% of 357 decks +31% synergy
Fortune Thief
31% of 135 decks +31% synergy
Instants
Unexplained Absence
62% of 66 decks +61% synergy
Path to Exile
61% of 71 decks +15% synergy
Expose the Culprit
52% of 132 decks +51% synergy
Showstopping Surprise
50% of 131 decks +49% synergy
Swords to Plowshares
48% of 71 decks -15% synergy
Reality Shift
47% of 232 decks +38% synergy
Heroic Intervention
40% of 357 decks +11% synergy
Chaos Warp
37% of 135 decks +5% synergy
Cyclonic Rift
35% of 232 decks +7% synergy
Beast Within
34% of 357 decks -5% synergy
Become Anonymous
31% of 32 decks +30% synergy
Assassin's Trophy
26% of 200 decks -5% synergy
Teferi's Protection
25% of 71 decks +5% synergy
Break Down the Door
20% of 15 decks +18% synergy
Sudden Substitution
20% of 232 decks +19% synergy
Fierce Guardianship
19% of 228 decks +1% synergy
Vampiric Tutor
19% of 200 decks +1% synergy
Revitalizing Repast
19% of 37 decks +6% synergy
Putrefy
18% of 200 decks +2% synergy
Counterspell
18% of 232 decks -25% synergy
Arcane Denial
17% of 232 decks -3% synergy
Cyber Conversion
17% of 126 decks +15% synergy
Worldly Tutor
17% of 357 decks +2% synergy
Sink into Stupor
16% of 43 decks +3% synergy
Sultai Charm
16% of 200 decks +11% synergy
Akroma's Will
15% of 71 decks +6% synergy
Deflecting Swat
15% of 135 decks -1% synergy
Generous Gift
14% of 71 decks -12% synergy
Deadly Rollick
13% of 196 decks +3% synergy
Mana Drain
13% of 232 decks -2% synergy
Return of the Wildspeaker
12% of 355 decks -1% synergy
An Offer You Can't Refuse
12% of 200 decks -8% synergy
Growth Spiral
12% of 232 decks -10% synergy
Fell the Profane
11% of 37 decks -1% synergy
Valakut Awakening
10% of 135 decks +3% synergy
Backslide
9% of 232 decks +9% synergy
Biomass Mutation
9% of 232 decks +8% synergy
Rapid Hybridization
9% of 232 decks -1% synergy
Congregation at Dawn
8% of 71 decks +7% synergy
Enlightened Tutor
8% of 71 decks -9% synergy
Great Train Heist
8% of 37 decks +3% synergy
Swan Song
8% of 232 decks -9% synergy
Archdruid's Charm
7% of 231 decks +0% synergy
Leadership Vacuum
7% of 232 decks +6% synergy
Negate
6% of 232 decks -16% synergy
Boros Charm
6% of 65 decks -19% synergy
Golgari Charm
6% of 200 decks +0% synergy
Abrade
6% of 135 decks -5% synergy
Flawless Maneuver
6% of 71 decks -4% synergy
Eladamri's Call
6% of 71 decks -6% synergy
Sorceries
Hide in Plain Sight
63% of 167 decks +63% synergy
Nature's Lore
52% of 357 decks +20% synergy
Ghastly Conscription
49% of 200 decks +49% synergy
Austere Command
46% of 71 decks +34% synergy
Three Visits
45% of 357 decks +21% synergy
Farseek
39% of 357 decks +5% synergy
Blasphemous Act
37% of 135 decks +3% synergy
Valgavoth's Onslaught
33% of 15 decks +30% synergy
Cultivate
32% of 357 decks -14% synergy
Jeska's Will
30% of 135 decks +12% synergy
Dusk // Dawn
28% of 71 decks +25% synergy
Fell the Mighty
27% of 71 decks +24% synergy
Rampant Growth
27% of 357 decks -8% synergy
Stump Stomp
25% of 32 decks +16% synergy
Demonic Tutor
22% of 200 decks -0% synergy
All Is Dust
20% of 357 decks +18% synergy
Kodama's Reach
18% of 357 decks -14% synergy
Decimate
17% of 135 decks +9% synergy
Under the Skin
14% of 28 decks +12% synergy
Overwhelming Stampede
13% of 357 decks +7% synergy
Bala Ged Recovery
12% of 351 decks +3% synergy
Chain Reaction
10% of 135 decks +5% synergy
Triumph of the Hordes
8% of 357 decks +5% synergy
Shamanic Revelation
8% of 357 decks -1% synergy
Villainous Wealth
8% of 200 decks -0% synergy
Titanic Ultimatum
8% of 65 decks +5% synergy
Retribution of the Meek
7% of 71 decks +7% synergy
Bridgeworks Battle
7% of 71 decks +1% synergy
Farewell
7% of 71 decks -6% synergy
Toxic Deluge
7% of 200 decks -10% synergy
Road of Return
7% of 357 decks +6% synergy
Mythos of Brokkos
7% of 195 decks +5% synergy
Wildcall
6% of 357 decks +6% synergy
Gamble
6% of 135 decks -4% synergy
Diabolic Tutor
6% of 200 decks -1% synergy
Utility Artifacts
Scroll of Fate
74% of 357 decks +74% synergy
Dream Chisel
71% of 357 decks +71% synergy
Forsaken Monument
34% of 351 decks +33% synergy
Mystic Forge
33% of 357 decks +30% synergy
Ashnod's Altar
26% of 357 decks +18% synergy
Semblance Anvil
25% of 357 decks +24% synergy
Vedalken Orrery
24% of 357 decks +23% synergy
Crystal Shard
23% of 232 decks +22% synergy
Cloud Key
23% of 357 decks +21% synergy
Lightning Greaves
21% of 357 decks -4% synergy
Cryptic Coat
19% of 108 decks +19% synergy
Strionic Resonator
15% of 357 decks +12% synergy
Phyrexian Altar
15% of 357 decks +11% synergy
Swiftfoot Boots
12% of 357 decks -16% synergy
Lifecrafter's Bestiary
12% of 357 decks +8% synergy
The Great Henge
11% of 355 decks +1% synergy
Sensei's Divining Top
9% of 357 decks +3% synergy
Symmetry Matrix
7% of 312 decks +7% synergy
Helm of Awakening
7% of 357 decks +6% synergy
Altar of Dementia
7% of 357 decks +4% synergy
Blasting Station
6% of 357 decks +6% synergy
Battlemage's Bracers
5% of 135 decks +4% synergy
Enchantments
Secret Plans
76% of 232 decks +75% synergy
Trail of Mystery
74% of 357 decks +73% synergy
Primordial Mist
73% of 232 decks +73% synergy
Gift of Doom
73% of 200 decks +72% synergy
Mastery of the Unseen
68% of 71 decks +67% synergy
Leyline of Anticipation
62% of 232 decks +58% synergy
Rhythm of the Wild
49% of 135 decks +25% synergy
Guardian Project
42% of 357 decks +33% synergy
Goblin Bombardment
39% of 135 decks +33% synergy
Wilderness Reclamation
35% of 357 decks +31% synergy
Elven Chorus
33% of 285 decks +29% synergy
Equilibrium
31% of 232 decks +31% synergy
Assemble the Players
25% of 67 decks +24% synergy
Heartless Summoning
23% of 200 decks +22% synergy
Rhystic Study
23% of 232 decks -5% synergy
Experimental Lab // Staff Room
21% of 28 decks +18% synergy
Growing Rites of Itlimoc
21% of 357 decks +16% synergy
Shadow in the Warp
19% of 135 decks +15% synergy
Impact Tremors
19% of 135 decks +10% synergy
Words of Wind
16% of 232 decks +16% synergy
Tocasia's Welcome
15% of 71 decks +11% synergy
Growing Dread
14% of 21 decks +9% synergy
Mirari's Wake
14% of 71 decks +0% synergy
Muraganda Petroglyphs
14% of 357 decks +13% synergy
Sylvan Library
13% of 357 decks +2% synergy
Beastmaster Ascension
13% of 357 decks +7% synergy
Communal Brewing
13% of 39 decks +9% synergy
Smothering Tithe
13% of 71 decks -12% synergy
Cryptolith Rite
13% of 357 decks +9% synergy
Break Through the Line
12% of 135 decks +12% synergy
Death in Heaven
11% of 102 decks +10% synergy
Evolutionary Leap
10% of 357 decks +9% synergy
Mystic Remora
10% of 232 decks -8% synergy
Tribute to the World Tree
9% of 291 decks +1% synergy
Wild Growth
9% of 357 decks -2% synergy
Teferi's Ageless Insight
8% of 226 decks +2% synergy
Utopia Sprawl
6% of 357 decks -1% synergy
Rageform
6% of 135 decks +6% synergy
Exploration
6% of 357 decks -3% synergy
Zendikar Resurgent
5% of 357 decks +3% synergy
Planeswalkers
Vivien, Champion of the Wilds
44% of 357 decks +42% synergy
Utility Lands
Branch of Vitu-Ghazi
74% of 241 decks +73% synergy
Zoetic Cavern
73% of 357 decks +73% synergy
Alchemist's Refuge
54% of 232 decks +48% synergy
Reliquary Tower
52% of 357 decks +23% synergy
Bojuka Bog
48% of 200 decks +18% synergy
Kessig Wolf Run
47% of 135 decks +32% synergy
Shrine of the Forsaken Gods
34% of 357 decks +32% synergy
Tomb of the Spirit Dragon
32% of 357 decks +31% synergy
Yavimaya, Cradle of Growth
31% of 342 decks +22% synergy
Temple of the False God
24% of 357 decks +15% synergy
Boseiju, Who Endures
24% of 330 decks +4% synergy
Otawara, Soaring City
17% of 205 decks +0% synergy
Ancient Tomb
16% of 357 decks +5% synergy
Urborg, Tomb of Yawgmoth
13% of 357 decks +3% synergy
Takenuma, Abandoned Mire
12% of 173 decks +1% synergy
Winding Canyons
10% of 357 decks +10% synergy
Mosswort Bridge
10% of 357 decks -0% synergy
Thespian's Stage
9% of 357 decks +7% synergy
Restless Vinestalk
9% of 127 decks +6% synergy
Riptide Laboratory
9% of 232 decks +6% synergy
Rogue's Passage
7% of 357 decks -12% synergy
High Market
7% of 357 decks +4% synergy
Novijen, Heart of Progress
7% of 232 decks +5% synergy
Diamond City
6% of 97 decks +5% synergy
Lumbering Falls
6% of 232 decks +4% synergy
Homeward Path
6% of 357 decks +4% synergy
Gavony Township
6% of 71 decks -4% synergy
Gaea's Cradle
6% of 357 decks -0% synergy
Castle Garenbrig
5% of 355 decks +0% synergy
Ruins of Oran-Rief
5% of 357 decks +5% synergy
Mana Artifacts
Sol Ring
91% of 357 decks +7% synergy
Arcane Signet
77% of 355 decks +5% synergy
Talisman of Curiosity
29% of 232 decks +17% synergy
Simic Signet
24% of 232 decks +9% synergy
Talisman of Resilience
20% of 200 decks +8% synergy
Talisman of Dominance
19% of 200 decks -12% synergy
Thought Vessel
17% of 357 decks +0% synergy
Talisman of Impulse
16% of 135 decks +7% synergy
Gruul Signet
14% of 135 decks +2% synergy
Golgari Signet
14% of 200 decks +1% synergy
Dimir Signet
14% of 200 decks -16% synergy
Talisman of Conviction
14% of 65 decks -9% synergy
Thran Dynamo
12% of 357 decks +7% synergy
Talisman of Unity
11% of 71 decks +4% synergy
Fellwar Stone
11% of 357 decks -10% synergy
Selesnya Signet
10% of 71 decks +1% synergy
Boros Signet
8% of 65 decks -16% synergy
Mana Crypt
8% of 357 decks -2% synergy
Decanter of Endless Water
8% of 320 decks +3% synergy
Chromatic Lantern
7% of 357 decks -2% synergy
Commander's Sphere
5% of 357 decks -10% synergy
Lands
Command Tower
96% of 357 decks +22% synergy
Cinder Glade
64% of 135 decks +26% synergy
Overgrown Tomb
61% of 200 decks +18% synergy
Canopy Vista
61% of 71 decks +25% synergy
Watery Grave
60% of 200 decks +20% synergy
Stomping Ground
59% of 135 decks +18% synergy
Breeding Pool
58% of 232 decks +17% synergy
Temple Garden
58% of 71 decks +17% synergy
Zagoth Triome
56% of 195 decks +26% synergy
Sacred Foundry
52% of 65 decks +16% synergy
Yavimaya Coast
51% of 232 decks +24% synergy
Jungle Shrine
51% of 65 decks +19% synergy
Spara's Headquarters
50% of 12 decks +18% synergy
Hallowed Fountain
50% of 12 decks +9% synergy
Exotic Orchard
49% of 357 decks +14% synergy
Rejuvenating Springs
48% of 225 decks +19% synergy
Llanowar Wastes
48% of 200 decks +22% synergy
Opulent Palace
45% of 200 decks +18% synergy
Rootbound Crag
44% of 135 decks +21% synergy
Hinterland Harbor
43% of 232 decks +16% synergy
Furycalm Snarl
43% of 65 decks +30% synergy
Jetmir's Garden
42% of 65 decks +8% synergy
Spire Garden
41% of 135 decks +17% synergy
Sunken Hollow
41% of 200 decks +6% synergy
Fortified Village
41% of 71 decks +26% synergy
Game Trail
41% of 135 decks +25% synergy
Rockfall Vale
41% of 135 decks +19% synergy
Frontier Bivouac
38% of 13 decks +11% synergy
Ketria Triome
38% of 13 decks +6% synergy
Undergrowth Stadium
36% of 193 decks +10% synergy
Morphic Pool
36% of 200 decks +9% synergy
Dreamroot Cascade
35% of 208 decks +17% synergy
Sungrass Prairie
34% of 71 decks +22% synergy
Seaside Citadel
33% of 12 decks +7% synergy
Sea of Clouds
33% of 12 decks +7% synergy
Woodland Cemetery
33% of 200 decks +6% synergy
Bountiful Promenade
32% of 71 decks +8% synergy
Temple of Triumph
32% of 65 decks +16% synergy
Foreboding Landscape
31% of 35 decks +18% synergy
Steam Vents
31% of 13 decks -8% synergy
Simic Growth Chamber
29% of 232 decks +9% synergy
Sheltered Thicket
29% of 135 decks +22% synergy
Misty Rainforest
28% of 357 decks +17% 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
Drowned Catacomb
28% of 200 decks +2% synergy
Temple of Abandon
27% of 135 decks +14% synergy
Gruul Turf
27% of 135 decks +11% synergy
Karplusan Forest
27% of 135 decks +11% synergy