Marath, Will of the Wild + Cathars' Crusade + Workhorse + Conclave Mentor
Marath, Will of the Wild
Cathars' Crusade
Workhorse
Conclave Mentor
Requires
Marath, Will of the Wild must be on the battlefield.
Cathars' Crusade must be on the battlefield.
Workhorse must be on the battlefield.
Conclave Mentor must be on the battlefield.
Marath has at least two +1/+1 counters on it.
Workhorse has at least one +1/+1 counters on it.
Mana needed: 
Steps
- Activate Marath by paying , creating a 1/1 Elemental token.
- Cathars' Crusade triggers putting two +1/+1 counter to all creatures you control.
- Activate Workhorse by removing a +1/+1 counter from it, adding .
- Repeat.
Results
Infinite +1/+1 counters. Infinite colorless mana. Infinite creature tokens. Infinite damage. Infinite death triggers. Infinite ETB. Infinite LTB.
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