Experiment Kraj + Devoted Druid + Primal Vigor

Experiment Kraj
Devoted Druid
Primal Vigor

Requires
Experiment Kraj must be on the battlefield. Devoted Druid must be on the battlefield. Primal Vigor must be on the battlefield. Experiment Kraj does not have summoning sickness.
Steps
  1. Activate Experiment Kraj by tapping it, putting two +1/+1 counters onto Devoted Druid.
  2. Activate Experiment Kraj using Devoted Druid's last ability by putting a -1/-1 counter on itself, untapping it.
  3. Activate Experiment Kraj's own ability, putting two +1/+1 counters on itself.
  4. Remove the -1/-1 counter and one of the +1/+1 counters from Experiment Kraj as a state-based action.
  5. Repeat steps 2 through 4 any number of times, resulting in any number of +1/+1 counters on Experiment Kraj.
  6. Activate Experiment Kraj using Devoted Druid's last ability by putting a -1/-1 counter on itself, untapping it.
  7. Activate Experiment Kraj using Devoted Druid's first ability by tapping it, add g.
  8. Repeat steps 6 and 7 any number of times.
  9. You may also activate Experiment Kraj's own ability any number of times instead of step 7, putting any number of +1/+1 counters onto creatures.
Results
Infinite +1/+1 counters. Infinite green mana.

Top Commanders (4)
Experiment Kraj
0.42% of 1184 decks 5 decks
Kros, Defense Contractor
0.15% of 1950 decks 3 decks
Xavier Sal, Infested Captain
0.07% of 2970 decks 2 decks
Ezuri, Claw of Progress
0.03% of 5966 decks 2 decks
High Synergy Cards (4)
Generous Gift
100% of 4 decks +88% synergy
Fathom Mage
79% of 14 decks +78% synergy
Gyre Sage
79% of 14 decks +77% synergy
Incubation Druid
79% of 14 decks +76% synergy
Top Cards (10)
Counterspell
79% of 14 decks +57% synergy
Forgotten Ancient
71% of 14 decks +69% synergy
Rishkar, Peema Renegade
64% of 14 decks +62% synergy
Kami of Whispered Hopes
62% of 8 decks +59% synergy
Master Biomancer
57% of 14 decks +56% synergy
Simic Ascendancy
57% of 14 decks +56% synergy
Evolution Sage
57% of 14 decks +54% synergy
Hardened Scales
57% of 14 decks +53% synergy
Beast Within
57% of 14 decks +38% synergy
Vorel of the Hull Clade
50% of 14 decks +49% synergy
Creatures (43)
Falco Spara, Pactweaver
75% of 4 decks +75% synergy
Nils, Discipline Enforcer
75% of 4 decks +75% synergy
Grateful Apparition
75% of 4 decks +74% synergy
Ezuri, Stalker of Spheres
50% of 10 decks +49% synergy
Tekuthal, Inquiry Dominus
44% of 9 decks +43% synergy
Zameck Guildmage
43% of 14 decks +43% synergy
Fertilid
43% of 14 decks +42% synergy
Thrummingbird
43% of 14 decks +41% synergy
Cytoplast Manipulator
36% of 14 decks +36% synergy
Vigean Graftmage
36% of 14 decks +36% synergy
Kalonian Hydra
36% of 14 decks +34% synergy
Cankerbloom
33% of 9 decks +29% synergy
Gilder Bairn
29% of 14 decks +29% synergy
Plaxcaster Frogling
29% of 14 decks +28% synergy
Prime Speaker Zegana
29% of 14 decks +28% synergy
Murkfiend Liege
29% of 14 decks +28% synergy
Kiora's Follower
29% of 14 decks +27% synergy
Herald of Secret Streams
29% of 14 decks +27% synergy
Flux Channeler
29% of 14 decks +27% synergy
Birds of Paradise
29% of 14 decks +16% synergy
Park Heights Maverick
23% of 13 decks +23% synergy
Kodama of the West Tree
23% of 13 decks +21% synergy
Spike Weaver
21% of 14 decks +21% synergy
Simic Manipulator
21% of 14 decks +21% synergy
Krosan Restorer
21% of 14 decks +21% synergy
Sage of Hours
21% of 14 decks +21% synergy
Viridian Joiner
21% of 14 decks +21% synergy
Roalesk, Apex Hybrid
21% of 14 decks +21% synergy
Generous Patron
21% of 14 decks +21% synergy
Zegana, Utopian Speaker
21% of 14 decks +21% synergy
Pili-Pala
21% of 14 decks +21% synergy
Viral Drake
21% of 14 decks +21% synergy
Willbreaker
21% of 14 decks +21% synergy
Toothy, Imaginary Friend
21% of 14 decks +21% synergy
Pir, Imaginative Rascal
21% of 14 decks +21% synergy
Arcanis the Omnipotent
21% of 14 decks +21% synergy
Armorcraft Judge
21% of 14 decks +21% synergy
Duskshell Crawler
21% of 14 decks +21% synergy
Steelbane Hydra
21% of 14 decks +21% synergy
Vigor
21% of 14 decks +20% synergy
Chasm Skulker
21% of 14 decks +19% synergy
Scavenging Ooze
21% of 14 decks +19% synergy
Champion of Lambholt
21% of 14 decks +18% synergy
Instants (10)
Swords to Plowshares
75% of 4 decks +47% synergy
Pongify
43% of 14 decks +37% synergy
An Offer You Can't Refuse
38% of 13 decks +28% synergy
Growth Spiral
36% of 14 decks +31% synergy
Experimental Augury
33% of 9 decks +32% synergy
Inspiring Call
29% of 14 decks +25% synergy
Rapid Hybridization
29% of 14 decks +24% synergy
Voidslime
21% of 14 decks +21% synergy
Arcane Denial
21% of 14 decks +12% synergy
Negate
21% of 14 decks +10% synergy
Sorceries (10)
Tezzeret's Gambit
50% of 14 decks +48% synergy
Rampant Growth
43% of 14 decks +26% synergy
Unnatural Restoration
33% of 9 decks +31% synergy
Curse of the Swine
29% of 14 decks +26% synergy
Farseek
29% of 14 decks +13% synergy
Cultivate
29% of 14 decks +6% synergy
Urban Evolution
21% of 14 decks +20% synergy
Rishkar's Expertise
21% of 14 decks +16% synergy
Three Visits
21% of 14 decks +10% synergy
Kodama's Reach
21% of 14 decks +6% synergy
Utility Artifacts (6)
Ozolith, the Shattered Spire
50% of 8 decks +47% synergy
Lightning Greaves
36% of 14 decks +10% synergy
Swiftfoot Boots
36% of 14 decks +7% synergy
Contagion Engine
29% of 14 decks +27% synergy
Illusionist's Bracers
29% of 14 decks +27% synergy
Contagion Clasp
21% of 14 decks +20% synergy
Enchantments (7)
Resourceful Defense
75% of 4 decks +74% synergy
Together Forever
75% of 4 decks +74% synergy
Inexorable Tide
43% of 14 decks +42% synergy
Tribute to the World Tree
38% of 8 decks +33% synergy
Freed from the Real
36% of 14 decks +35% synergy
Branching Evolution
36% of 14 decks +34% synergy
Doubling Season
36% of 14 decks +32% synergy
Utility Lands (9)
Gavony Township
75% of 4 decks +73% synergy
Karn's Bastion
57% of 14 decks +52% synergy
Llanowar Reborn
43% of 14 decks +42% synergy
Nesting Grounds
36% of 14 decks +34% synergy
Oran-Rief, the Vastwood
36% of 14 decks +33% synergy
Rogue's Passage
36% of 14 decks +17% synergy
Reliquary Tower
36% of 14 decks +7% synergy
Novijen, Heart of Progress
29% of 14 decks +28% synergy
Mosswort Bridge
21% of 14 decks +17% synergy
Mana Artifacts (5)
Sol Ring
100% of 14 decks +16% synergy
Arcane Signet
64% of 14 decks -7% synergy
Simic Signet
29% of 14 decks +25% synergy
Everflowing Chalice
29% of 14 decks +24% synergy
Replicating Ring
21% of 14 decks +20% synergy
Lands (22)
Seaside Citadel
100% of 4 decks +97% synergy
Prairie Stream
100% of 4 decks +93% synergy
Canopy Vista
100% of 4 decks +92% synergy
Command Tower
86% of 14 decks +12% synergy
Port Town
75% of 4 decks +72% synergy
Yavimaya Coast
71% of 14 decks +66% synergy
Simic Growth Chamber
64% of 14 decks +60% synergy
Exotic Orchard
64% of 14 decks +30% synergy
Temple of Mystery
57% of 14 decks +53% synergy
Hinterland Harbor
57% of 14 decks +52% synergy
Dreamroot Cascade
43% of 14 decks +39% synergy
Rejuvenating Springs
43% of 14 decks +37% synergy
Flooded Grove
36% of 14 decks +33% synergy
Myriad Landscape
36% of 14 decks +15% synergy
Littjara Mirrorlake
29% of 14 decks +28% synergy
Vivid Grove
29% of 14 decks +28% synergy
Breeding Pool
29% of 14 decks +19% synergy
Terramorphic Expanse
29% of 14 decks +13% synergy
Path of Ancestry
29% of 14 decks +9% synergy
Evolving Wilds
29% of 14 decks +7% synergy
Brokers Hideout
23% of 13 decks +21% synergy
Vivid Creek
21% of 14 decks +21% synergy