Strong, the Brutish Thespian + Agatha's Soul Cauldron + Triskelion

Strong, the Brutish Thespian
Agatha's Soul Cauldron
Triskelion

Requires
Strong, the Brutish Thespian must be on the battlefield. Agatha's Soul Cauldron must be on the battlefield. Triskelion must be in exile (exiled by Agatha's Soul Cauldron). Strong has at least one +1/+1 counter on it.
Steps
  1. Activate Strong using Triskelion's ability by removing a +1/+1 counter from it, dealing 1 damage to Strong.
  2. Strong triggers, putting three +1/+1 counters on it and causing you to get three rad counters.
  3. Repeat an arbitrarily large number of times.
  4. Activate Strong using Triskelion's ability by removing a +1/+1 counter from it, dealing 1 damage to any target.
  5. Repeat step 4 as desired.
Results
Infinite +1/+1 counters on Strong. Infinite damage. Infinite rad counters for yourself.

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High Synergy Cards
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100% of 5 decks +97% synergy
Gyre Sage
80% of 5 decks +76% synergy
Hardened Scales
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Creatures
Yoshimaru, Ever Faithful
100% of 1 decks +99% synergy
Goblin Sharpshooter
100% of 1 decks +99% synergy
Godo, Bandit Warlord
100% of 1 decks +99% synergy
Ob Nixilis, Captive Kingpin
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Grumgully, the Generous
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Hajar, Loyal Bodyguard
100% of 1 decks +97% synergy
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100% of 1 decks +93% synergy
Jetmir, Nexus of Revels
100% of 1 decks +92% synergy
Ragavan, Nimble Pilferer
100% of 1 decks +92% synergy
Faeburrow Elder
100% of 1 decks +88% synergy
Kutzil, Malamet Exemplar
100% of 1 decks +81% synergy
Esper Sentinel
100% of 1 decks +79% synergy
Fathom Mage
75% of 4 decks +71% synergy
Muldrotha, the Gravetide
75% of 4 decks +69% synergy
Screeching Scorchbeast
60% of 5 decks +58% synergy
Winding Constrictor
60% of 5 decks +56% synergy
Incubation Druid
60% of 5 decks +55% synergy
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60% of 5 decks +52% synergy
Bruvac the Grandiloquent
50% of 4 decks +49% synergy
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50% of 4 decks +48% synergy
Ruin Crab
50% of 4 decks +48% synergy
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50% of 4 decks +45% synergy
Thassa's Oracle
50% of 4 decks +43% synergy
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40% of 5 decks +39% synergy
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40% of 5 decks +39% synergy
Scurry Oak
40% of 5 decks +38% synergy
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40% of 5 decks +37% synergy
Kalonian Hydra
40% of 5 decks +37% synergy
Kodama of the West Tree
40% of 5 decks +36% synergy
Corpsejack Menace
40% of 5 decks +35% synergy
Champion of Lambholt
40% of 5 decks +33% synergy
Evolution Sage
40% of 5 decks +33% synergy
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40% of 5 decks +32% synergy
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33% of 3 decks +32% synergy
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25% of 4 decks +25% synergy
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25% of 4 decks +25% synergy
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25% of 4 decks +24% synergy
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Eladamri's Call
100% of 1 decks +89% synergy
Enlightened Tutor
100% of 1 decks +82% synergy
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100% of 1 decks +37% synergy
Fierce Guardianship
50% of 4 decks +32% synergy
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50% of 4 decks +29% synergy
Inspiring Call
40% of 5 decks +32% synergy
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40% of 5 decks +22% synergy
Radstorm
25% of 4 decks +23% synergy
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25% of 4 decks +23% synergy
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25% of 4 decks +22% synergy
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25% of 4 decks +21% synergy
Mental Misstep
25% of 4 decks +19% synergy
Flusterstorm
25% of 4 decks +18% synergy
Pact of Negation
25% of 4 decks +18% synergy
Reality Shift
25% of 4 decks +16% synergy
Force of Will
25% of 4 decks +14% synergy
Mana Drain
25% of 4 decks +10% synergy
Swan Song
25% of 4 decks +8% synergy
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25% of 4 decks +2% synergy
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20% of 5 decks +20% synergy
Ultimate Price
20% of 5 decks +20% synergy
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20% of 5 decks +20% synergy
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20% of 5 decks +17% synergy
Tragic Slip
20% of 5 decks +16% synergy
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20% of 5 decks +16% synergy
Tainted Pact
20% of 5 decks +16% synergy
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20% of 5 decks +13% synergy
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20% of 5 decks +13% synergy
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20% of 5 decks +12% synergy
Deadly Rollick
20% of 5 decks +9% synergy
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20% of 5 decks +6% synergy
Putrefy
20% of 5 decks +4% synergy
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20% of 5 decks -10% synergy
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40% of 5 decks +6% synergy
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40% of 5 decks +12% synergy
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25% of 4 decks +15% synergy
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25% of 4 decks +14% synergy
Tainted Isle
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Tropical Island
25% of 4 decks +11% synergy
Underground Sea
25% of 4 decks +11% synergy
Darkwater Catacombs
25% of 4 decks +10% synergy
Temple of Mystery
25% of 4 decks +8% synergy
Dreamroot Cascade
25% of 4 decks +6% synergy
Shipwreck Marsh
25% of 4 decks +6% synergy
Drowned Catacomb
25% of 4 decks -0% synergy
Morphic Pool
25% of 4 decks -1% synergy
Opulent Palace
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Hinterland Harbor
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Sunken Hollow
25% of 4 decks -10% synergy
Thran Quarry
20% of 5 decks +20% synergy
Tarnished Citadel
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Plaza of Heroes
20% of 5 decks +17% synergy
Nurturing Peatland
20% of 5 decks +14% synergy
Mana Confluence
20% of 5 decks +13% synergy
Darkbore Pathway
20% of 5 decks +11% synergy
Twilight Mire
20% of 5 decks +10% synergy
Wooded Foothills
20% of 5 decks +10% synergy
Bloodstained Mire
20% of 5 decks +10% synergy
Arid Mesa
20% of 5 decks +9% synergy
Scalding Tarn
20% of 5 decks +9% synergy
Marsh Flats
20% of 5 decks +9% synergy
Deathcap Glade
20% of 5 decks +6% synergy
Path of Ancestry
20% of 5 decks -1% synergy