Uro, Titan of Nature's Wrath, Gwenna, Eyes of Gaea, Myth Unbound, Mirrormade, and Ashnod's Altar

Prerequisites

• Uro, Titan of Nature's Wrath in the command zone
• Gwenna, Eyes of Gaea on the battlefield
• Myth Unbound on the battlefield
• Mirrormade on the battlefield
• Ashnod's Altar on the battlefield
• Gwenna does not have summoning sickness
• available

Steps

1. Activate Gwenna by tapping it, adding that can only be spent to cast creature spells or activate abilities of creatures
2. Cast Uro from the command zone by paying
3. Gwenna triggers, putting a +1/+1 counter on it and untapping itself
4. Uro enters the battlefield, triggering its first and second abilities
5. Holding priority, activate Ashnod's Altar by sacrificing Uro, adding
6. Choose to return Uro to the command zone from your graveyard
7. Myth Unbound and Mirrormade each trigger, causing you to draw two cards
8. Resolve the first Uro trigger, causing you to not sacrifice Uro due to it no longer being on the battlefield
9. Resolve the second Uro trigger, causing you to gain three life, draw a card, and put any land from your hand onto the battlefield
10. Repeat

Results

• Infinite card draw
• Infinite draw triggers
• Near-infinite +1/+1 counters on Gwenna
• Near-infinite colorless mana
• Near-infinite commander casts
• Near-infinite death triggers
• Near-infinite ETB
• Near-infinite landfall triggers
• Near-infinite lifegain
• Near-infinite lifegain triggers
• Near-infinite LTB
• Near-infinite sacrifice triggers
• Near-infinite storm count
• Pull all lands from your hand and library onto the battlefield