Mikaeus, the Unhallowed, Workhorse, and Skullclamp

Prerequisites

• Mikaeus, the Unhallowed on the battlefield
• Workhorse on the battlefield
• Skullclamp on the battlefield
• if Workhorse does not have a +1/+1 counter on it available

Steps

1. Activate Workhorse by removing a +1/+1 counter from it, adding
2. Repeat step 1 until Workhorse does not have any +1/+1 counters on it
3. Activate Skullclamp's equip ability by paying , attaching it to Workhorse
4. Workhorse dies as a state-based action due to having zero toughness, triggering its undying ability and Skullclamp
5. Resolve the Workhorse trigger, returning it from your graveyard to the battlefield with five +1/+1 counters on it
6. Resolve the Skullclamp trigger, causing you to draw two cards
7. Repeat

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite colorless mana
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite LTB