CommanderLegacyVintage
Result
Infinite colorless mana, Infinite death triggers, Infinite ETB, Infinite LTB
Activate Workhorse by removing a +1/+1 counter from it, adding .
Repeat step 1 until Workhorse does not have any +1/+1 counters on it.
Workhorse dies as a state-based action due to having zero toughness.
Workhorse's undying ability triggers, returning it from your graveyard to the battlefield with five +1/+1 counters on it.
Repeat.
Component Cards
How It Works
1
Activate Workhorse by removing a +1/+1 counter from it, adding .
Repeat step 1 until Workhorse does not have any +1/+1 counters on it.
Workhorse dies as a state-based action due to having zero toughness.
Workhorse's undying ability triggers, returning it from your graveyard to the battlefield with five +1/+1 counters on it.
Repeat.