Moritte of the Frost, Omarthis, Ghostfire Initiate, and Mirror Box

Prerequisites

• Moritte of the Frost in hand or in the command zone
• Omarthis, Ghostfire Initiate on the battlefield
• Mirror Box on the battlefield
• plus enough mana to pay for commander tax, if applicable available

Steps

1. Cast Moritte of the Frost by paying plus commander tax (if applicable)
2. Choose to have Moritte of the Frost enter the battlefield as a copy of Omarthis with two +1/+1 counters on it
3. Omarthis's first triggered ability triggers, putting a +1/+1 counter on itself
4. Moritte of the Frost triggers, putting a +1/+1 counter on itself
5. Repeat from step 3 any number of times
6. End the loop by declining to put a +1/+1 counter on one of your creatures
7. Warning: Omarthis's last ability can increase the risk of losing by drawing from an empty library if you place enough counters on them

Results

• Infinite +1/+1 counters on Omarthis and Moritte of the Frost