Shalai and Hallar + Devoted Druid + Arcus Acolyte + Conclave Mentor

Shalai and Hallar
Devoted Druid
Arcus Acolyte
Conclave Mentor

Requires
Shalai and Hallar must be on the battlefield. Devoted Druid must be on the battlefield. Arcus Acolyte must be on the battlefield. Conclave Mentor 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 .
  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 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.

Shalai and Hallar
0.40% of 8949 decks 36 decks
Marath, Will of the Wild
0.04% of 2413 decks 1 decks
High Synergy Cards
Kami of Whispered Hopes
86% of 37 decks +77% synergy
Hardened Scales
84% of 37 decks +75% synergy
The Red Terror
76% of 37 decks +72% synergy
Heliod, Sun-Crowned
62% of 37 decks +60% synergy
Mikaeus, the Lunarch
62% of 37 decks +58% synergy
Kutzil, Malamet Exemplar
78% of 23 decks +56% synergy
Ozolith, the Shattered Spire
62% of 37 decks +55% synergy
All Will Be One
62% of 37 decks +55% synergy
Forgotten Ancient
59% of 37 decks +54% synergy
Basking Broodscale
55% of 11 decks +49% synergy
Top Cards
Swords to Plowshares
68% of 37 decks +8% synergy
Inspiring Call
59% of 37 decks +49% synergy
Path to Exile
59% of 37 decks +7% synergy
Champion of Lambholt
57% of 37 decks +43% synergy
Cultivate
57% of 37 decks +3% synergy
Rhythm of the Wild
54% of 37 decks +20% synergy
Scurry Oak
51% of 37 decks +49% synergy
Incubation Druid
51% of 37 decks +41% synergy
Envoy of the Ancestors
50% of 10 decks +47% synergy
Rishkar, Peema Renegade
49% of 37 decks +42% synergy
Creatures
War Elemental
46% of 37 decks +45% synergy
Ivy Lane Denizen
46% of 37 decks +44% synergy
Managorger Hydra
46% of 37 decks +41% synergy
Halana and Alena, Partners
46% of 37 decks +41% synergy
Evolution Witness
45% of 11 decks +38% synergy
Anim Pakal, Thousandth Moon
44% of 18 decks +36% synergy
Herd Baloth
43% of 37 decks +41% synergy
Good-Fortune Unicorn
43% of 37 decks +40% synergy
Gyre Sage
43% of 37 decks +34% synergy
Bright-Palm, Soul Awakener
42% of 36 decks +38% synergy
Ajani's Pridemate
41% of 37 decks +39% synergy
Walking Ballista
41% of 37 decks +38% synergy
Trelasarra, Moon Dancer
38% of 37 decks +37% synergy
Tender Wildguide
38% of 8 decks +32% synergy
Celestial Unicorn
35% of 37 decks +35% synergy
Abzan Battle Priest
32% of 37 decks +30% synergy
Armorcraft Judge
32% of 37 decks +28% synergy
Sovereign Okinec Ahau
30% of 23 decks +24% synergy
Rosie Cotton of South Lane
30% of 33 decks +23% synergy
Hamza, Guardian of Arashin
30% of 37 decks +26% synergy
Shalai, Voice of Plenty
30% of 37 decks +25% synergy
Avacyn's Pilgrim
30% of 37 decks +16% synergy
Delighted Halfling
27% of 33 decks +16% synergy
Taurean Mauler
27% of 37 decks +17% synergy
Vigor
24% of 37 decks +22% synergy
Conclave Sledge-Captain
24% of 37 decks +20% synergy
Krenko, Tin Street Kingpin
24% of 37 decks +17% synergy
Llanowar Elves
24% of 37 decks +7% synergy
Birds of Paradise
24% of 37 decks +2% synergy
Voice of the Blessed
22% of 37 decks +21% synergy
Dusk Legion Duelist
22% of 37 decks +16% synergy
Elvish Mystic
22% of 37 decks +7% synergy
Aragorn, Hornburg Hero
21% of 24 decks +19% synergy
Ageless Entity
19% of 37 decks +19% synergy
Spike Feeder
19% of 37 decks +19% synergy
Scavenging Ooze
19% of 37 decks +16% synergy
Evolution Sage
19% of 37 decks +15% synergy
Kalonian Hydra
19% of 37 decks +14% synergy
Grand Abolisher
19% of 37 decks +13% synergy
Abzan Falconer
19% of 37 decks +13% synergy
Dauntless Dismantler
17% of 23 decks +15% synergy
Arwen, Weaver of Hope
17% of 30 decks +11% synergy
Wildwood Scourge
16% of 37 decks +16% synergy
Archangel of Thune
16% of 37 decks +15% synergy
Benevolent Hydra
16% of 37 decks +15% synergy
Constable of the Realm
16% of 37 decks +15% synergy
Cankerbloom
16% of 37 decks +15% synergy
Botanical Brawler
16% of 37 decks +14% synergy
Lae'zel, Vlaakith's Champion
16% of 37 decks +14% synergy
Fertilid
16% of 37 decks +13% synergy
Instants
Eladamri's Call
41% of 37 decks +29% synergy
Heroic Intervention
38% of 37 decks -1% synergy
Snakeskin Veil
35% of 37 decks +33% synergy
Worldly Tutor
35% of 37 decks +20% synergy
Generous Gift
30% of 37 decks -1% synergy
Enlightened Tutor
27% of 37 decks +14% synergy
Beast Within
24% of 37 decks -14% synergy
Unbreakable Formation
19% of 37 decks +10% synergy
Chaos Warp
19% of 37 decks +1% synergy
Stroke of Midnight
17% of 30 decks +7% synergy
Take Up the Shield
16% of 37 decks +16% synergy
Invigorating Surge
14% of 37 decks +13% synergy
Signal the Clans
14% of 37 decks +13% synergy
Silkguard
14% of 37 decks +12% synergy
Abrade
14% of 37 decks +10% synergy
Silence
14% of 37 decks +10% synergy
Return to Nature
14% of 37 decks +8% synergy
Nature's Claim
14% of 37 decks +7% synergy
Chord of Calling
14% of 37 decks +7% synergy
Dromoka's Command
11% of 37 decks +8% synergy
Deflecting Swat
11% of 37 decks -1% synergy
Flawless Maneuver
11% of 37 decks -3% synergy
Teferi's Protection
11% of 37 decks -8% synergy
Boros Charm
11% of 37 decks -18% synergy
Mortal's Ardor
8% of 37 decks +8% synergy
Unbounded Potential
8% of 37 decks +8% synergy
Calamity's Wake
8% of 37 decks +7% synergy
Surge of Salvation
8% of 37 decks +7% synergy
Tamiyo's Safekeeping
8% of 37 decks +5% synergy
Congregation at Dawn
8% of 37 decks +4% synergy
Veil of Summer
8% of 37 decks +4% synergy
Sorceries
Three Visits
35% of 37 decks +6% synergy
Nature's Lore
35% of 37 decks -3% synergy
Farseek
35% of 37 decks -15% synergy
Kodama's Reach
30% of 37 decks -6% synergy
Damning Verdict
24% of 37 decks +19% synergy
Rampant Growth
24% of 37 decks -15% synergy
Requisition Raid
23% of 13 decks +17% synergy
Angelfire Ignition
14% of 37 decks +13% synergy
Twinflame
14% of 37 decks +12% synergy
Austere Command
14% of 37 decks +1% synergy
Time of Need
11% of 37 decks +10% synergy
Eldritch Evolution
11% of 37 decks +7% synergy
Rishkar's Expertise
11% of 37 decks -5% synergy
Visions of Dominance
8% of 37 decks +8% synergy
Thirsting Roots
8% of 37 decks +7% synergy
Gamble
8% of 37 decks +4% synergy
Idyllic Tutor
8% of 37 decks +4% synergy
Vandalblast
8% of 37 decks +2% synergy
Farewell
8% of 37 decks -2% synergy
Harmonize
8% of 37 decks -4% synergy
Shamanic Revelation
8% of 37 decks -9% synergy
Utility Artifacts
Swiftfoot Boots
30% of 37 decks +4% synergy
The Ozolith
27% of 37 decks +22% synergy
Basilisk Collar
22% of 37 decks +17% synergy
The Great Henge
22% of 37 decks +7% synergy
Shadowspear
16% of 37 decks +14% synergy
Staff of Domination
14% of 37 decks +13% synergy
Animation Module
11% of 37 decks +11% synergy
Lightning Greaves
11% of 37 decks -12% synergy
Agatha's Soul Cauldron
10% of 30 decks +9% synergy
Enchantments
Stocking the Pantry
50% of 6 decks +46% synergy
Branching Evolution
46% of 37 decks +41% synergy
Innkeeper's Talent
43% of 7 decks +34% synergy
Cathars' Crusade
41% of 37 decks +33% synergy
Uncivil Unrest
35% of 37 decks +29% synergy
Felidar Retreat
35% of 37 decks +15% synergy
Mayael's Aria
27% of 37 decks +22% synergy
Court of Garenbrig
26% of 27 decks +23% synergy
Lifelink
24% of 37 decks +24% synergy
Cleric Class
24% of 37 decks +24% synergy
Invigorating Hot Spring
24% of 37 decks +22% synergy
Annie Joins Up
23% of 13 decks -2% synergy
Swift Reconfiguration
19% of 37 decks +18% synergy
Keen Sense
19% of 37 decks +18% synergy
Light of Promise
16% of 37 decks +16% synergy
Rite of Passage
16% of 37 decks +15% synergy
Together Forever
16% of 37 decks +14% synergy
Tribute to the World Tree
16% of 37 decks +7% synergy
Spirit Link
14% of 37 decks +13% synergy
Snake Umbra
14% of 37 decks +11% synergy
Utopia Sprawl
14% of 37 decks +6% synergy
Sylvan Library
14% of 37 decks +2% synergy
Virtue of Loyalty
11% of 27 decks +8% synergy
Ajani's Welcome
11% of 37 decks +10% synergy
Primal Vigor
11% of 37 decks +7% synergy
Impact Tremors
11% of 37 decks -3% synergy
Felidar Umbra
8% of 37 decks +8% synergy
Resourceful Defense
8% of 37 decks +7% synergy
Sterling Grove
8% of 37 decks +5% synergy
Battles
Invasion of Ikoria
9% of 34 decks -0% synergy
Planeswalkers
Jiang Yanggu, Wildcrafter
11% of 37 decks +10% synergy
Ajani, the Greathearted
11% of 37 decks +8% synergy
Nissa, Voice of Zendikar
8% of 37 decks +7% synergy
Utility Lands
Gavony Township
54% of 37 decks +42% synergy
Karn's Bastion
41% of 37 decks +38% synergy
Mosswort Bridge
19% of 37 decks -0% synergy
Oran-Rief, the Vastwood
16% of 37 decks +14% synergy
Llanowar Reborn
16% of 37 decks +14% synergy
Rogue's Passage
16% of 37 decks -10% synergy
Reliquary Tower
14% of 37 decks -4% synergy
Yavimaya, Cradle of Growth
14% of 37 decks -5% synergy
Witch's Clinic
11% of 37 decks +10% synergy
Drannith Ruins
9% of 34 decks +8% synergy
Nesting Grounds
8% of 37 decks +7% synergy
Field of Ruin
8% of 37 decks +6% synergy
Temple of the False God
8% of 37 decks -4% synergy
Boseiju, Who Endures
8% of 37 decks -9% synergy
Mana Artifacts
Arcane Signet
81% of 37 decks +9% synergy
Sol Ring
76% of 37 decks -8% synergy
Fellwar Stone
24% of 37 decks +13% synergy
Commander's Sphere
22% of 37 decks +10% synergy
Selesnya Signet
16% of 37 decks +4% synergy
Talisman of Unity
14% of 37 decks +5% synergy
Boros Signet
14% of 37 decks +2% synergy
Gruul Signet
14% of 37 decks +1% synergy
Talisman of Impulse
11% of 37 decks +4% synergy
Talisman of Conviction
11% of 37 decks +4% synergy
Mana Crypt
8% of 37 decks +2% synergy
Lands
Command Tower
92% of 37 decks +1% synergy
Cinder Glade
62% of 37 decks +12% synergy
Canopy Vista
57% of 37 decks +8% synergy
Jungle Shrine
54% of 37 decks -3% synergy
Exotic Orchard
49% of 37 decks -4% synergy
Temple Garden
43% of 37 decks +0% synergy
Stomping Ground
43% of 37 decks -0% synergy
Jetmir's Garden
43% of 37 decks -3% synergy
Sheltering Landscape
40% of 10 decks +14% synergy
Sungrass Prairie
32% of 37 decks +18% synergy
Rootbound Crag
32% of 37 decks +0% synergy
Path of Ancestry
32% of 37 decks -1% synergy
Arid Mesa
30% of 37 decks +2% synergy
Windswept Heath
30% of 37 decks +1% synergy
Sunpetal Grove
30% of 37 decks -2% synergy
Sacred Foundry
30% of 37 decks -9% synergy
Bretagard Stronghold
27% of 37 decks +25% synergy
Mossfire Valley
27% of 37 decks +15% synergy
Fortified Village
27% of 37 decks +8% synergy
Wooded Foothills
27% of 37 decks +0% synergy
Clifftop Retreat
27% of 37 decks -7% synergy
Krosan Verge
24% of 37 decks +10% synergy
Game Trail
24% of 37 decks +6% synergy
Spectator Seating
24% of 37 decks -4% synergy
Evolving Wilds
24% of 37 decks -6% synergy
Bountiful Promenade
24% of 37 decks -7% synergy
Temple of Abandon
22% of 37 decks +8% synergy
Rockfall Vale
22% of 37 decks -5% synergy
Spire Garden
22% of 37 decks -8% synergy
Commercial District
21% of 14 decks +10% synergy
Lush Portico
21% of 14 decks +10% synergy
Furycalm Snarl
19% of 37 decks +6% synergy
Temple of Plenty
19% of 37 decks +5% synergy
Temple of Triumph
19% of 37 decks +4% synergy
Karplusan Forest
19% of 37 decks +3% synergy
Battlefield Forge
19% of 37 decks +1% synergy
Captivating Cave
17% of 18 decks +16% synergy
Opal Palace
16% of 37 decks +14% synergy
Brushland
16% of 37 decks +0% synergy
Marsh Flats
14% of 37 decks +7% synergy
Plateau
14% of 37 decks +3% synergy
Taiga
14% of 37 decks +2% synergy
Savannah
14% of 37 decks +2% synergy
Overgrown Farmland
14% of 37 decks -9% synergy
Sacred Peaks
11% of 37 decks +6% synergy
Ash Barrens
11% of 37 decks +6% synergy
Scalding Tarn
11% of 37 decks +5% synergy
Bloodstained Mire
11% of 37 decks +5% synergy
City of Brass
11% of 37 decks +3% synergy
Scattered Groves
11% of 37 decks +2% synergy