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 untap of creatures you control.

Top Commanders (3)
Durnan of the Yawning Portal // Tavern Brawler
2.70% of 37 decks 1 decks
Stangg
1.56% of 64 decks 1 decks
Stangg, Echo Warrior
0.41% of 2205 decks 9 decks
High Synergy Cards (10)
Strong Back
100% of 4 decks +94% synergy
Chishiro, the Shattered Blade
82% of 11 decks +79% synergy
Sticky Fingers
82% of 11 decks +76% synergy
Bear Umbra
82% of 11 decks +71% synergy
Setessan Champion
73% of 11 decks +70% synergy
Kediss, Emberclaw Familiar
73% of 11 decks +68% synergy
Bequeathal
64% of 11 decks +62% synergy
Ancestral Mask
64% of 11 decks +61% synergy
Rune of Might
64% of 11 decks +61% synergy
Sanctum Weaver
64% of 11 decks +61% synergy
Top Cards (10)
Swiftfoot Boots
73% of 11 decks +36% synergy
Eidolon of Blossoms
64% of 11 decks +61% synergy
Wulfgar of Icewind Dale
64% of 11 decks +58% synergy
Aggravated Assault
64% of 11 decks +56% synergy
Cultivate
64% of 11 decks +9% synergy
Royal Treatment
56% of 9 decks +50% synergy
Tanuki Transplanter
55% of 11 decks +51% synergy
One with the Kami
55% of 11 decks +50% synergy
Akki Battle Squad
55% of 11 decks +48% synergy
Mage Slayer
55% of 11 decks +46% synergy
Creatures (8)
Lizard Blades
45% of 11 decks +40% synergy
Goblin Anarchomancer
45% of 11 decks -6% synergy
Tanglespan Lookout
33% of 9 decks +30% synergy
Guardian Augmenter
27% of 11 decks +23% synergy
Komainu Battle Armor
27% of 11 decks +23% synergy
Karlach, Fury of Avernus
27% of 11 decks +20% synergy
Xenagos, God of Revels
27% of 11 decks +16% synergy
Sakura-Tribe Elder
27% of 11 decks -1% synergy
Instants (9)
Tamiyo's Safekeeping
45% of 11 decks +28% synergy
Heroic Intervention
45% of 11 decks +9% synergy
Chaos Warp
45% of 11 decks +2% synergy
Tyvar's Stand
36% of 11 decks +19% synergy
Beast Within
36% of 11 decks -23% synergy
Kazuul's Fury
27% of 11 decks +21% synergy
Silkguard
27% of 11 decks +19% synergy
Snakeskin Veil
27% of 11 decks +19% synergy
Gaea's Gift
27% of 11 decks +17% synergy
Sorceries (7)
Three Visits
55% of 11 decks +24% synergy
Rampant Growth
55% of 11 decks +10% synergy
Nature's Lore
36% of 11 decks -3% synergy
Jeska's Will
27% of 11 decks +6% synergy
Farseek
27% of 11 decks +1% synergy
Blasphemous Act
27% of 11 decks -14% synergy
Kodama's Reach
27% of 11 decks -15% synergy
Utility Artifacts (14)
Trailblazer's Boots
45% of 11 decks +44% synergy
Thran Power Suit
45% of 11 decks +43% synergy
Nettlecyst
45% of 11 decks +43% synergy
Sword of the Animist
45% of 11 decks +41% synergy
Basilisk Collar
45% of 11 decks +39% synergy
Mithril Coat
45% of 11 decks +35% synergy
Mirror Box
36% of 11 decks +34% synergy
Hammer of Nazahn
36% of 11 decks +34% synergy
The Reaver Cleaver
36% of 11 decks +32% synergy
Skullclamp
36% of 11 decks +31% synergy
Helm of the Gods
27% of 11 decks +26% synergy
Sword of Feast and Famine
27% of 11 decks +25% synergy
Embercleave
27% of 11 decks +22% synergy
Blackblade Reforged
27% of 11 decks +18% synergy
Enchantments (22)
Rancor
55% of 11 decks +44% synergy
Most Wanted
45% of 11 decks +44% synergy
Audacity
45% of 11 decks +42% synergy
Snake Umbra
45% of 11 decks +35% synergy
Elephant Guide
36% of 11 decks +36% synergy
Indomitable Might
36% of 11 decks +35% synergy
Fruit of the First Tree
36% of 11 decks +35% synergy
Colossification
36% of 11 decks +33% synergy
Alpha Authority
36% of 11 decks +33% synergy
Ordeal of Nylea
36% of 11 decks +32% synergy
Parallel Lives
36% of 11 decks +30% synergy
Pandemonium
27% of 11 decks +27% synergy
Crystal Carapace
27% of 11 decks +27% synergy
Mantle of the Wolf
27% of 11 decks +26% synergy
Frog Tongue
27% of 11 decks +26% synergy
Nature's Will
27% of 11 decks +26% synergy
Cartouche of Strength
27% of 11 decks +26% synergy
Setessan Training
27% of 11 decks +26% synergy
Greater Good
27% of 11 decks +19% synergy
Warstorm Surge
27% of 11 decks +15% synergy
Garruk's Uprising
27% of 11 decks -2% synergy
Rhythm of the Wild
27% of 11 decks -15% synergy
Utility Lands (3)
Rogue's Passage
36% of 11 decks +10% synergy
Kessig Wolf Run
36% of 11 decks -5% synergy
Skarrg, the Rage Pits
27% of 11 decks +14% synergy
Mana Artifacts (3)
Sol Ring
100% of 11 decks +21% synergy
Arcane Signet
73% of 11 decks +14% synergy
Talisman of Impulse
27% of 11 decks +14% synergy
Lands (14)
Command Tower
73% of 11 decks -10% synergy
Game Trail
64% of 11 decks +19% synergy
Rootbound Crag
64% of 11 decks +19% synergy
Stomping Ground
64% of 11 decks +17% synergy
Cinder Glade
64% of 11 decks -5% synergy
Cragcrown Pathway
55% of 11 decks +29% synergy
Spire Garden
45% of 11 decks +7% synergy
Rockfall Vale
45% of 11 decks -1% synergy
Mossfire Valley
36% of 11 decks +7% synergy
Temple of Abandon
36% of 11 decks +3% synergy
Karplusan Forest
36% of 11 decks +3% synergy
Copperline Gorge
27% of 11 decks +17% synergy
Fire-Lit Thicket
27% of 11 decks +11% synergy
Gruul Turf
27% of 11 decks -13% synergy