The Ur-Dragon
Haakon, Stromgald Scourge
Morophon, the Boundless
Nameless Inversion
1

   Prerequisites

What do I need to start this combo?
The Ur-Dragon on the battlefield or in the command zone.
Nameless Inversion in hand or in your graveyard.
Haakon and Morophon on the battlefield.

   Steps

How does this combo work?
1
Cast Nameless Inversion from your graveyard, as it is a Knight card, by paying 0 due to The Ur-Dragon and Morophon, giving a creature +3/-3 until end of turn.
2
If the creature has toughness 0 or less, the creature dies as a state-based action.
3
Repeat as desired.

   Results

What do I get from this combo?
Reduce the toughness of opponents' creatures to 0 when it enters the battlefield
Reduce any number of target creatures' toughness to 0
The Ur-Dragon
1.12% of 34295 decks 383 decks
Morophon, the Boundless
0.02% of 10780 decks 2 decks
Reaper King
0.03% of 5898 decks 2 decks
Rukarumel, Biologist
0.06% of 3616 decks 2 decks
Ulalek, Fused Atrocity
0.01% of 16092 decks 1 decks
New Cards
Mox Jasper
24% of 107 decks +18% synergy
Call the Spirit Dragons
12% of 69 decks -1% synergy
Dracogenesis
8% of 77 decks -4% synergy
Maelstrom of the Spirit Dragon
7% of 76 decks -4% synergy
Roiling Dragonstorm
5% of 76 decks +3% synergy
High Synergy Cards
Amoeboid Changeling
97% of 390 decks +95% synergy
Masked Vandal
96% of 390 decks +93% synergy
Changeling Outcast
96% of 390 decks +93% synergy
Taurean Mauler
96% of 390 decks +93% synergy
Universal Automaton
95% of 390 decks +93% synergy
Magda, Brazen Outlaw
94% of 390 decks +93% synergy
Mirror Entity
97% of 390 decks +92% synergy
Maskwood Nexus
97% of 390 decks +91% synergy
Crib Swap
95% of 390 decks +91% synergy
Risen Reef
93% of 390 decks +90% synergy
Top Cards
Realmwalker
96% of 390 decks +88% synergy
Unsettled Mariner
93% of 390 decks +90% synergy
Shapesharer
90% of 390 decks +89% synergy
Harabaz Druid
90% of 390 decks +89% synergy
Reaper King
89% of 390 decks +88% synergy
Mothdust Changeling
89% of 390 decks +87% synergy
Cloudshredder Sliver
88% of 390 decks +80% synergy
Guardian Gladewalker
88% of 390 decks +87% synergy
Impostor of the Sixth Pride
88% of 390 decks +87% synergy
Knight Exemplar
85% of 390 decks +84% synergy
Game Changers
Yuriko, the Tiger's Shadow
86% of 390 decks +85% synergy
Demonic Tutor
6% of 390 decks -14% synergy
Rhystic Study
6% of 390 decks -17% synergy
Creatures
Skeletal Changeling
85% of 390 decks +83% synergy
Valiant Changeling
84% of 390 decks +83% synergy
Woodland Changeling
83% of 390 decks +82% synergy
Fire-Belly Changeling
76% of 390 decks +75% synergy
Voja, Jaws of the Conclave
74% of 326 decks +73% synergy
Three Tree Mascot
71% of 272 decks +69% synergy
Priest of Titania
70% of 390 decks +69% synergy
Feline Sovereign
69% of 390 decks +69% synergy
Sylvia Brightspear
69% of 390 decks +68% synergy
Rivaz of the Claw
64% of 390 decks +56% synergy
Tovolar, Dire Overlord
64% of 390 decks +63% synergy
Heronblade Elite
59% of 390 decks +58% synergy
Spellstutter Sprite
57% of 390 decks +57% synergy
Tiamat
56% of 390 decks +49% synergy
Manaweft Sliver
56% of 390 decks +47% synergy
Merrow Reejerey
54% of 390 decks +54% synergy
Gemhide Sliver
54% of 390 decks +45% synergy
Hakbal of the Surging Soul
53% of 346 decks +53% synergy
Muerra, Trash Tactician
53% of 273 decks +53% synergy
Harmonic Sliver
51% of 390 decks +43% synergy
Titan of Littjara
49% of 374 decks +47% synergy
Realm-Cloaked Giant
42% of 390 decks +42% synergy
Thundercloud Shaman
42% of 390 decks +42% synergy
Irregular Cohort
42% of 390 decks +40% synergy
Malcolm, Keen-Eyed Navigator
41% of 390 decks +41% synergy
Unesh, Criosphinx Sovereign
40% of 390 decks +40% synergy
Kibo, Uktabi Prince
39% of 390 decks +38% synergy
Breeches, Eager Pillager
39% of 354 decks +39% synergy
Ingenious Infiltrator
37% of 390 decks +37% synergy
Katilda, Dawnhart Prime
37% of 390 decks +35% synergy
Graveshifter
35% of 390 decks +33% synergy
Greymond, Avacyn's Stalwart
34% of 390 decks +33% synergy
Giada, Font of Hope
33% of 390 decks +32% synergy
Avian Changeling
32% of 390 decks +31% synergy
Thurid, Mare of Destiny
30% of 210 decks +29% synergy
Prosperous Thief
27% of 390 decks +27% synergy
Hellkite Courser
25% of 390 decks +20% synergy
Bloodline Pretender
24% of 390 decks +22% synergy
Be'lakor, the Dark Master
21% of 390 decks +20% synergy
Sea Gate Loremaster
18% of 390 decks +17% synergy
Venomous Changeling
18% of 390 decks +17% synergy
Mistwalker
17% of 390 decks +17% synergy
Shadow-Rite Priest
15% of 390 decks +15% synergy
Herald of Hoofbeats
13% of 390 decks +13% synergy
Roaming Throne
13% of 343 decks +1% synergy
Gornog, the Red Reaper
12% of 210 decks +11% synergy
Barkform Harvester
11% of 273 decks +10% synergy
Miirym, Sentinel Wyrm
11% of 390 decks -0% synergy
Drogskol Captain
10% of 390 decks +9% synergy
The First Sliver
10% of 390 decks +7% synergy
Instants
Blades of Velis Vel
82% of 390 decks +82% synergy
Wings of Velis Vel
58% of 390 decks +58% synergy
Stinging Study
21% of 390 decks +21% synergy
Shields of Velis Vel
13% of 390 decks +12% synergy
Entomb
13% of 390 decks +11% synergy
Heroic Intervention
11% of 390 decks -10% synergy
Swords to Plowshares
11% of 390 decks -30% synergy
Flame of Anor
6% of 383 decks +6% synergy
Sorceries
Coveted Prize
82% of 390 decks +81% synergy
Peer Pressure
77% of 390 decks +76% synergy
Cateran Summons
72% of 390 decks +71% synergy
Widespread Brutality
66% of 390 decks +66% synergy
Notorious Throng
58% of 390 decks +58% synergy
Viewpoint Synchronization
44% of 278 decks +40% synergy
Crux of Fate
27% of 390 decks +17% synergy
Bring to Light
19% of 390 decks +15% synergy
Exterminate!
17% of 370 decks +17% synergy
Farseek
16% of 390 decks -28% synergy
Wargate
13% of 390 decks +11% synergy
Jarad's Orders
12% of 390 decks +12% synergy
Formless Genesis
12% of 247 decks +11% synergy
Buried Alive
10% of 390 decks +9% synergy
Three Visits
8% of 390 decks -15% synergy
Whelming Wave
7% of 390 decks +6% synergy
Nature's Lore
7% of 390 decks -21% synergy
Cultivate
7% of 390 decks -30% synergy
Majestic Genesis
6% of 390 decks +4% synergy
Storm of Souls
5% of 390 decks +5% synergy
Utility Artifacts
Throne of the Grim Captain
39% of 346 decks +39% synergy
Realmbreaker, the Invasion Tree
7% of 390 decks +5% synergy
Pyre of Heroes
6% of 390 decks +5% synergy
Herald's Horn
5% of 390 decks -13% synergy
Enchantments
Liliana's Contract
80% of 390 decks +79% synergy
The Bears of Littjara
65% of 390 decks +64% synergy
Kindred Discovery
58% of 390 decks +47% synergy
Unholy Annex // Ritual Chamber
30% of 248 decks +27% synergy
Black Market Connections
28% of 390 decks +23% synergy
Dragon Tempest
14% of 390 decks +4% synergy
Battle of Frost and Fire
13% of 390 decks +12% synergy
Arcane Adaptation
9% of 390 decks +8% synergy
Rooftop Storm
9% of 390 decks +8% synergy
Curse of Opulence
8% of 390 decks +7% synergy
Descendants' Path
6% of 390 decks +3% synergy
Reflections of Littjara
6% of 390 decks -2% synergy
Double Down
5% of 296 decks +5% synergy
Utility Lands
Swarmyard
75% of 390 decks +74% synergy
Mutavault
63% of 390 decks +62% synergy
Flamekin Village
56% of 390 decks +55% synergy
Griffin Canyon
41% of 390 decks +41% synergy
Three Tree City
12% of 273 decks +4% synergy
Reliquary Tower
6% of 390 decks -20% synergy
Riptide Laboratory
5% of 390 decks +5% synergy
Yavimaya, Cradle of Growth
5% of 390 decks -5% synergy
Mana Artifacts
Arcane Signet
38% of 390 decks -37% synergy
Sol Ring
34% of 390 decks -44% synergy
Chromatic Lantern
25% of 390 decks -28% synergy
Dragon's Hoard
24% of 390 decks +17% synergy
Fellwar Stone
11% of 390 decks -21% synergy
Lands
Command Tower
96% of 390 decks +8% synergy
The World Tree
94% of 390 decks +62% synergy
Exotic Orchard
88% of 390 decks +25% synergy
Path of Ancestry
84% of 390 decks +42% synergy
Murmuring Bosk
77% of 390 decks +74% synergy
Ancient Amphitheater
70% of 390 decks +70% synergy
Wanderwine Hub
66% of 390 decks +65% synergy
Secluded Glen
65% of 390 decks +64% synergy
Reflecting Pool
64% of 390 decks +49% synergy
Gilt-Leaf Palace
63% of 390 decks +62% synergy
City of Brass
59% of 390 decks +40% synergy
Zagoth Triome
59% of 390 decks +36% synergy
Indatha Triome
58% of 390 decks +34% synergy
Fortified Beachhead
58% of 390 decks +57% synergy
Ketria Triome
58% of 390 decks +32% synergy
Auntie's Hovel
56% of 390 decks +56% synergy
Cavern of Souls
53% of 390 decks +37% synergy
Raugrin Triome
53% of 390 decks +34% synergy
Wooded Foothills
52% of 390 decks +26% synergy
Rejuvenating Springs
51% of 390 decks +43% synergy
Training Center
49% of 390 decks +43% synergy
Undergrowth Stadium
48% of 390 decks +42% synergy
Mana Confluence
48% of 390 decks +29% synergy
Spire Garden
47% of 390 decks +40% synergy
Gallifrey Council Chamber
46% of 353 decks +46% synergy
Vault of Champions
46% of 390 decks +40% synergy
Morphic Pool
45% of 390 decks +39% synergy
Spectator Seating
44% of 390 decks +39% synergy
Haven of the Spirit Dragon
39% of 390 decks +31% synergy
Windswept Heath
32% of 390 decks +4% synergy
Savai Triome
28% of 390 decks +11% synergy
Overgrown Tomb
27% of 390 decks -2% synergy
Stomping Ground
25% of 390 decks -4% synergy
Breeding Pool
25% of 390 decks -5% synergy
Watery Grave
25% of 390 decks +0% synergy
Hallowed Fountain
24% of 390 decks -2% synergy
Temple Garden
24% of 390 decks -6% synergy
Bountiful Promenade
24% of 390 decks +16% synergy
Luxury Suite
23% of 390 decks +17% synergy
Misty Rainforest
22% of 390 decks -6% synergy
Godless Shrine
21% of 390 decks -3% synergy
Flooded Strand
21% of 390 decks -3% synergy
Marsh Flats
21% of 390 decks -4% synergy
Verdant Catacombs
21% of 390 decks -6% synergy
Secluded Courtyard
21% of 390 decks +3% synergy
Ally Encampment
20% of 390 decks +19% synergy
Polluted Delta
19% of 390 decks -4% synergy
Steam Vents
19% of 390 decks -5% synergy
Sacred Foundry
19% of 390 decks -4% synergy
Scalding Tarn
19% of 390 decks -5% synergy