Shalai and Hallar + Devoted Druid + Arcus Acolyte + Benevolent Hydra

Shalai and Hallar
Devoted Druid
Arcus Acolyte
Benevolent Hydra

Requires
Shalai and Hallar must be on the battlefield. Devoted Druid must be on the battlefield. Arcus Acolyte must be on the battlefield. Benevolent Hydra must be on the battlefield. Devoted Druid does not have summoning sickness and does not have a -1/-1 counter on it.
Steps
  1. Activate Devoted Druid's first ability by tapping it, adding g.
  2. Activate Devoted Druid's second ability by putting a -1/-1 counter on it, untapping it.
  3. If Devoted Druid has a +1/+1 counter on it, repeat from step 1 until Devoted Druid has no +1/+1 counters.
  4. Activate Devoted Druid's outlast ability by paying g and tapping it, putting two +1/+1 counters on Devoted Druid.
  5. Shalai and Hallar triggers, dealing 2 damage to an opponent.
  6. Repeat from step 2.
Results
Infinite damage.

Top Commanders (1)
Shalai and Hallar
0.04% of 7211 decks 3 decks
Creatures (50)
Elenda's Hierophant
100% of 1 decks +100% synergy
Ojer Axonil, Deepest Might
100% of 1 decks +99% synergy
War Elemental
100% of 3 decks +99% synergy
Heliod, Sun-Crowned
100% of 3 decks +97% synergy
Dauntless Dismantler
100% of 1 decks +97% synergy
The Red Terror
100% of 3 decks +96% synergy
Good-Fortune Unicorn
100% of 3 decks +96% synergy
Managorger Hydra
100% of 3 decks +95% synergy
Conclave Mentor
100% of 3 decks +93% synergy
Gyre Sage
100% of 3 decks +91% synergy
Incubation Druid
100% of 3 decks +90% synergy
Kami of Whispered Hopes
100% of 3 decks +89% synergy
Celestial Unicorn
67% of 3 decks +66% synergy
Voice of the Blessed
67% of 3 decks +66% synergy
Trelasarra, Moon Dancer
67% of 3 decks +66% synergy
Archangel of Thune
67% of 3 decks +66% synergy
Ajani's Pridemate
67% of 3 decks +65% synergy
Walking Ballista
67% of 3 decks +64% synergy
Kalonian Hydra
67% of 3 decks +62% synergy
Mikaeus, the Lunarch
67% of 3 decks +62% synergy
Halana and Alena, Partners
67% of 3 decks +62% synergy
Forgotten Ancient
67% of 3 decks +61% synergy
Rishkar, Peema Renegade
67% of 3 decks +60% synergy
Champion of Lambholt
67% of 3 decks +52% synergy
Arwen, Weaver of Hope
50% of 2 decks +44% synergy
Delighted Halfling
50% of 2 decks +39% synergy
Gideon's Company
33% of 3 decks +33% synergy
Twinblade Paladin
33% of 3 decks +33% synergy
Ageless Entity
33% of 3 decks +33% synergy
Tyrant Guard
33% of 3 decks +33% synergy
Hopeful Initiate
33% of 3 decks +33% synergy
Bane of Progress
33% of 3 decks +32% synergy
Sigarda, Font of Blessings
33% of 3 decks +32% synergy
Ivy Lane Denizen
33% of 3 decks +32% synergy
Grumgully, the Generous
33% of 3 decks +32% synergy
Vorinclex, Monstrous Raider
33% of 3 decks +31% synergy
Herd Baloth
33% of 3 decks +31% synergy
Abzan Battle Priest
33% of 3 decks +30% synergy
Emiel the Blessed
33% of 3 decks +30% synergy
Ranger-Captain of Eos
33% of 3 decks +30% synergy
Bright-Palm, Soul Awakener
33% of 3 decks +29% synergy
Armorcraft Judge
33% of 3 decks +29% synergy
Drannith Magistrate
33% of 3 decks +29% synergy
Shalai, Voice of Plenty
33% of 3 decks +28% synergy
Grand Abolisher
33% of 3 decks +28% synergy
Kodama of the West Tree
33% of 3 decks +28% synergy
Craterhoof Behemoth
33% of 3 decks +27% synergy
Dockside Extortionist
33% of 3 decks +25% synergy
Bloom Tender
33% of 3 decks +24% synergy
Taurean Mauler
33% of 3 decks +23% synergy
Instants (23)
Inspiring Call
100% of 3 decks +90% synergy
Silkguard
67% of 3 decks +65% synergy
Eladamri's Call
67% of 3 decks +54% synergy
Enlightened Tutor
67% of 3 decks +53% synergy
Worldly Tutor
67% of 3 decks +51% synergy
Generous Gift
67% of 3 decks +35% synergy
Heroic Intervention
67% of 3 decks +29% synergy
Path to Exile
67% of 3 decks +17% synergy
Swords to Plowshares
67% of 3 decks +8% synergy
Ruinous Intrusion
33% of 3 decks +33% synergy
Take Up the Shield
33% of 3 decks +33% synergy
Gaea's Gift
33% of 3 decks +32% synergy
Snakeskin Veil
33% of 3 decks +31% synergy
Dromoka's Command
33% of 3 decks +30% synergy
Valakut Awakening
33% of 3 decks +30% synergy
Silence
33% of 3 decks +29% synergy
Veil of Summer
33% of 3 decks +29% synergy
Chord of Calling
33% of 3 decks +27% synergy
Nature's Claim
33% of 3 decks +26% synergy
Akroma's Will
33% of 3 decks +14% synergy
Return of the Wildspeaker
33% of 3 decks +10% synergy
Boros Charm
33% of 3 decks +3% synergy
Beast Within
33% of 3 decks -7% synergy
Sorceries (15)
Damning Verdict
67% of 3 decks +62% synergy
Nature's Lore
67% of 3 decks +29% synergy
Farseek
67% of 3 decks +16% synergy
Gamble
33% of 3 decks +30% synergy
Eldritch Evolution
33% of 3 decks +29% synergy
Idyllic Tutor
33% of 3 decks +29% synergy
Vandalblast
33% of 3 decks +27% synergy
Bala Ged Recovery
33% of 3 decks +26% synergy
Finale of Devastation
33% of 3 decks +24% synergy
Farewell
33% of 3 decks +23% synergy
Rishkar's Expertise
33% of 3 decks +17% synergy
Three Visits
33% of 3 decks +4% synergy
Kodama's Reach
33% of 3 decks -4% synergy
Rampant Growth
33% of 3 decks -8% synergy
Cultivate
33% of 3 decks -23% synergy
Utility Artifacts (6)
The Ozolith
100% of 3 decks +95% synergy
Ozolith, the Shattered Spire
100% of 3 decks +92% synergy
Swiftfoot Boots
67% of 3 decks +42% synergy
Shadowspear
33% of 3 decks +31% synergy
Basilisk Collar
33% of 3 decks +29% synergy
The Great Henge
33% of 3 decks +19% synergy
Enchantments (17)
Court of Garenbrig
100% of 2 decks +96% synergy
All Will Be One
100% of 3 decks +92% synergy
Hardened Scales
100% of 3 decks +91% synergy
Rhythm of the Wild
100% of 3 decks +66% synergy
Lifelink
67% of 3 decks +66% synergy
Cleric Class
67% of 3 decks +66% synergy
Branching Evolution
67% of 3 decks +62% synergy
Uncivil Unrest
67% of 3 decks +59% synergy
Cathars' Crusade
67% of 3 decks +58% synergy
Felidar Retreat
67% of 3 decks +46% synergy
Light of Promise
33% of 3 decks +33% synergy
Rune of Sustenance
33% of 3 decks +33% synergy
Together Forever
33% of 3 decks +31% synergy
Primal Vigor
33% of 3 decks +30% synergy
Mayael's Aria
33% of 3 decks +28% synergy
Tribute to the World Tree
33% of 3 decks +22% synergy
Sylvan Library
33% of 3 decks +21% synergy
Battles (1)
Invasion of Ikoria
33% of 3 decks +23% synergy
Utility Lands (8)
Gavony Township
100% of 3 decks +87% synergy
Llanowar Reborn
67% of 3 decks +65% synergy
Karn's Bastion
67% of 3 decks +64% synergy
Drannith Ruins
33% of 3 decks +32% synergy
Oran-Rief, the Vastwood
33% of 3 decks +31% synergy
Bonders' Enclave
33% of 3 decks +31% synergy
Gaea's Cradle
33% of 3 decks +27% synergy
Rogue's Passage
33% of 3 decks +8% synergy
Mana Artifacts (5)
Arcane Signet
67% of 3 decks -4% synergy
Sol Ring
67% of 3 decks -17% synergy
Mana Crypt
33% of 3 decks +25% synergy
Fellwar Stone
33% of 3 decks +23% synergy
Commander's Sphere
33% of 3 decks +21% synergy
Lands (21)
Wooded Foothills
67% of 3 decks +42% synergy
Windswept Heath
67% of 3 decks +40% synergy
Arid Mesa
67% of 3 decks +39% synergy
Spectator Seating
67% of 3 decks +38% synergy
Spire Garden
67% of 3 decks +36% synergy
Bountiful Promenade
67% of 3 decks +35% synergy
Sacred Foundry
67% of 3 decks +27% synergy
Temple Garden
67% of 3 decks +23% synergy
Stomping Ground
67% of 3 decks +22% synergy
Demolition Field
33% of 3 decks +32% synergy
Bretagard Stronghold
33% of 3 decks +32% synergy
Mana Confluence
33% of 3 decks +26% synergy
City of Brass
33% of 3 decks +25% synergy
Sundown Pass
33% of 3 decks +17% synergy
Overgrown Farmland
33% of 3 decks +11% synergy
Rockfall Vale
33% of 3 decks +6% synergy
Canopy Vista
33% of 3 decks -15% synergy
Jetmir's Garden
33% of 3 decks -15% synergy
Cinder Glade
33% of 3 decks -17% synergy
Exotic Orchard
33% of 3 decks -18% synergy
Command Tower
33% of 3 decks -57% synergy