Stangg, Echo Warrior + Éomer, Marshal of Rohan + Helm of the Host

Stangg, Echo Warrior
Éomer, Marshal of Rohan
Helm of the Host

Requires
Stangg, Echo Warrior must be on the battlefield. Éomer, Marshal of Rohan must be on the battlefield. Helm of the Host must be on the battlefield. Helm of the Host attached to Éomer. Stangg does not have summoning sickness. An opponent cannot block and kill Stangg. You control another legendary creature that can attack this turn. You have a way to kill the additional legendary creature at instant speed.
Steps
  1. At the beginning of your combat phase, Helm of the Host triggers, creating a nonlegendary token copy of Éomer with haste.
  2. Declare Stangg and the additional legendary creature as attackers.
  3. Stangg triggers, creating a 3/4 Stangg Twin creature token that is tapped and attacking.
  4. Holding priority, kill the additional legendary creature.
  5. When the creature dies, each Éomer that has not triggered this turn triggers, causing you to untap all creatures you control and to get at least one additional combat phase after this one.
  6. Move to your next combat phase.
  7. At the beginning of your combat phase, Helm of the Host triggers, creating a nonlegendary token copy of Éomer with haste.
  8. Declare Stangg as an attacker.
  9. Stangg triggers, creating a 3/4 Stangg Twin creature token that is tapped and attacking.
  10. Put either Stangg Twin token into your graveyard due to the legend rule.
  11. Repeat from step 5.
Results
Infinite combat phases. Infinite death triggers. Infinite ETB. Infinite LTB. Infinite mana creatures you control can produce. Infinite untap of creatures you control.

Stangg, Echo Warrior
0.48% of 2498 decks 12 decks
Chishiro, the Shattered Blade
0.01% of 6688 decks 1 decks
Stangg
1.61% of 62 decks 1 decks
Havi, the All-Father
0.13% of 753 decks 1 decks
Durnan of the Yawning Portal // Tavern Brawler
2.17% of 46 decks 1 decks
Bruse Tarl, Boorish Herder // Kamahl, Heart of Krosa
0.29% of 345 decks 1 decks
New Cards
Chainsaw
75% of 4 decks +74% synergy
High Synergy Cards
Strong Back
90% of 10 decks +88% synergy
Bear Umbra
76% of 17 decks +72% synergy
Chishiro, the Shattered Blade
65% of 17 decks +64% synergy
Wulfgar of Icewind Dale
59% of 17 decks +57% synergy
Sticky Fingers
59% of 17 decks +56% synergy
Kediss, Emberclaw Familiar
59% of 17 decks +56% synergy
Akki Battle Squad
53% of 17 decks +52% synergy
Thran Power Suit
53% of 17 decks +52% synergy
Ancestral Mask
53% of 17 decks +51% synergy
Mage Slayer
53% of 17 decks +51% synergy
Top Cards
Swiftfoot Boots
71% of 17 decks +43% synergy
Cultivate
59% of 17 decks +13% synergy
Aggravated Assault
53% of 17 decks +49% synergy
Setessan Champion
53% of 17 decks +49% synergy
Eidolon of Blossoms
53% of 17 decks +48% synergy
Bequeathal
47% of 17 decks +47% synergy
Nettlecyst
47% of 17 decks +45% synergy
Rancor
47% of 17 decks +42% synergy
Sanctum Weaver
47% of 17 decks +41% synergy
Rampant Growth
47% of 17 decks +12% synergy
Creatures
Tanuki Transplanter
41% of 17 decks +40% synergy
Goblin Anarchomancer
41% of 17 decks +27% synergy
Guardian Augmenter
35% of 17 decks +34% synergy
Lizard Blades
35% of 17 decks +32% synergy
Komainu Battle Armor
29% of 17 decks +28% synergy
Karlach, Fury of Avernus
29% of 17 decks +26% synergy
Kodama of the West Tree
29% of 17 decks +25% synergy
Xenagos, God of Revels
29% of 17 decks +24% synergy
Tanglespan Lookout
27% of 15 decks +26% synergy
Godo, Bandit Warlord
24% of 17 decks +22% synergy
Delighted Halfling
24% of 17 decks +9% synergy
Elvish Mystic
24% of 17 decks +6% synergy
Birds of Paradise
24% of 17 decks -3% synergy
Storm Herald
18% of 17 decks +18% synergy
Valduk, Keeper of the Flame
18% of 17 decks +17% synergy
Reki, the History of Kamigawa
18% of 17 decks +17% synergy
Herald of the Pantheon
18% of 17 decks +15% synergy
Hajar, Loyal Bodyguard
18% of 17 decks +15% synergy
Sakura-Tribe Elder
18% of 17 decks -1% synergy
Llanowar Elves
18% of 17 decks -3% synergy
Instants
Heroic Intervention
41% of 17 decks +11% synergy
Chaos Warp
41% of 17 decks +9% synergy
Beast Within
41% of 17 decks +3% synergy
Tamiyo's Safekeeping
35% of 17 decks +29% synergy
Royal Treatment
33% of 15 decks +32% synergy
Fling
24% of 17 decks +21% synergy
Kazuul's Fury
24% of 17 decks +21% synergy
Tyvar's Stand
24% of 17 decks +18% synergy
Silkguard
18% of 17 decks +16% synergy
Gaea's Gift
18% of 17 decks +14% synergy
Snakeskin Veil
18% of 17 decks +14% synergy
Krosan Grip
18% of 17 decks +10% synergy
Harrow
18% of 17 decks +8% synergy
Sorceries
Three Visits
47% of 17 decks +22% synergy
Nature's Lore
35% of 17 decks +3% synergy
Kodama's Reach
29% of 17 decks -2% synergy
Blasphemous Act
29% of 17 decks -4% synergy
Farseek
29% of 17 decks -5% synergy
Vandalblast
18% of 17 decks +2% synergy
Jeska's Will
18% of 17 decks +0% synergy
Utility Artifacts
Mithril Coat
44% of 16 decks +38% synergy
Basilisk Collar
41% of 17 decks +38% synergy
Hammer of Nazahn
35% of 17 decks +34% synergy
Embercleave
35% of 17 decks +33% synergy
The Reaver Cleaver
35% of 17 decks +31% synergy
Blackblade Reforged
35% of 17 decks +31% synergy
Sword of the Animist
35% of 17 decks +31% synergy
Belt of Giant Strength
29% of 17 decks +29% synergy
Mirror Box
29% of 17 decks +28% synergy
Trailblazer's Boots
29% of 17 decks +28% synergy
Sword of Feast and Famine
29% of 17 decks +27% synergy
Lightning Greaves
29% of 17 decks +4% synergy
Tarrian's Soulcleaver
25% of 12 decks +23% synergy
Helm of the Gods
24% of 17 decks +23% synergy
Kaldra Compleat
24% of 17 decks +22% synergy
Darksteel Plate
24% of 17 decks +22% synergy
Hexplate Wallbreaker
24% of 17 decks +22% synergy
Skullclamp
24% of 17 decks +11% synergy
Heroes' Podium
18% of 17 decks +17% synergy
Champion's Helm
18% of 17 decks +17% synergy
Sword of Fire and Ice
18% of 17 decks +17% synergy
Commander's Plate
18% of 17 decks +15% synergy
Enchantments
Most Wanted
41% of 17 decks +41% synergy
One with the Kami
41% of 17 decks +41% synergy
Rune of Might
41% of 17 decks +41% synergy
Snake Umbra
41% of 17 decks +38% synergy
Grim Reaper's Sprint
40% of 10 decks +39% synergy
Etali's Favor
36% of 11 decks +35% synergy
Audacity
35% of 17 decks +34% synergy
Mantle of the Wolf
29% of 17 decks +29% synergy
Fruit of the First Tree
29% of 17 decks +29% synergy
Alpha Authority
29% of 17 decks +28% synergy
Elephant Guide
24% of 17 decks +23% synergy
One with Nature
24% of 17 decks +23% synergy
Runes of the Deus
24% of 17 decks +23% synergy
Indomitable Might
24% of 17 decks +23% synergy
Canopy Cover
24% of 17 decks +22% synergy
Ordeal of Nylea
24% of 17 decks +22% synergy
Colossification
24% of 17 decks +22% synergy
Parallel Lives
24% of 17 decks +16% synergy
Giant Inheritance
23% of 13 decks +23% synergy
Frog Tongue
18% of 17 decks +17% synergy
Pandemonium
18% of 17 decks +17% synergy
Crystal Carapace
18% of 17 decks +17% synergy
Mark of Sakiko
18% of 17 decks +17% synergy
Cartouche of Strength
18% of 17 decks +17% synergy
Setessan Training
18% of 17 decks +17% synergy
Pattern of Rebirth
18% of 17 decks +17% synergy
Sixth Sense
18% of 17 decks +17% synergy
Nature's Will
18% of 17 decks +16% synergy
Bard Class
18% of 17 decks +16% synergy
Enchantress's Presence
18% of 17 decks +13% synergy
Greater Good
18% of 17 decks +13% synergy
Warstorm Surge
18% of 17 decks +12% synergy
Rhythm of the Wild
18% of 17 decks -6% synergy
Utility Lands
Rogue's Passage
35% of 17 decks +16% synergy
Kessig Wolf Run
29% of 17 decks +14% synergy
Boseiju, Who Endures
24% of 17 decks +4% synergy
Skarrg, the Rage Pits
18% of 17 decks +15% synergy
Mana Artifacts
Sol Ring
94% of 17 decks +10% synergy
Arcane Signet
65% of 17 decks -7% synergy
Talisman of Impulse
18% of 17 decks +9% synergy
Gruul Signet
18% of 17 decks +6% synergy
Lands
Command Tower
71% of 17 decks -3% synergy
Stomping Ground
65% of 17 decks +24% synergy
Rootbound Crag
59% of 17 decks +35% synergy
Cinder Glade
59% of 17 decks +20% synergy
Cragcrown Pathway
47% of 17 decks +38% synergy
Game Trail
47% of 17 decks +31% synergy
Rockfall Vale
47% of 17 decks +25% synergy
Spire Garden
47% of 17 decks +23% synergy
Commercial District
36% of 11 decks +24% synergy
Mossfire Valley
35% of 17 decks +24% synergy
Karplusan Forest
35% of 17 decks +18% synergy
Temple of Abandon
29% of 17 decks +16% synergy
Fire-Lit Thicket
24% of 17 decks +19% synergy
Copperline Gorge
24% of 17 decks +19% synergy
Wooded Foothills
24% of 17 decks +13% synergy
Gruul Turf
24% of 17 decks +8% synergy
Exotic Orchard
24% of 17 decks -12% synergy