Umbris, Fear Manifest, Ruthless Technomancer, and Phyrexian Metamorph

Prerequisites

• Umbris, Fear Manifest on the battlefield
• Ruthless Technomancer in hand
• Phyrexian Metamorph on the battlefield
• Opponents have at least six cards in exile
• available

Steps

1. Cast Ruthless Technomancer by paying
2. Ruthless Technomancer enters the battlefield, causing you to sacrifice Umbris and create at least seven Treasure tokens
3. Activate six Treasure tokens by tapping and sacrificing them, adding
4. Activate Ruthless Technomancer by paying and sacrifcing Phyrexian Metamorph, returning Umbris from your graveyard to the battlefield
5. Umbris enters the battlefield, causing target opponent to exile cards from the top of your library until they exile a land card
6. Activate Ruthless Technomancer by paying and sacrifcing a Treasure token, returning Phyrexian Metamorph from your graveyard to the battlefield as a copy of Ruthless Technomancer
7. Phyrexian Metamorph enters the battlefield, causing you to sacrifice Umbris and create at least seven Treasure tokens
8. Repeat from step 3

Results

• Exile each opponent's library
• Infinite colored mana
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Infinite Treasure tokens