Teferi, Who Slows the Sunset, and The Peregrine Dynamo

Prerequisites

• Teferi, Who Slows the Sunset on the battlefield
• The Peregrine Dynamo on the battlefield
• You control a land and/or a creature or artifact that can collectively tap to produce at least

Steps

1. Activate Teferi's first loyalty ability by putting a loyalty counter on it
2. Holding priority, activate the mana-producing permanents by tapping them, adding at least
3. Activate The Peregrine Dynamo by paying and tapping it, copying Teferi's ability
4. Resolve the copy of Teferi's ability, untapping The Peregrine Dynamo and the mana producing artifact/land, and causing you to gain two life
5. Repeat from step 2

Results

• Infinite lifegain
• Infinite lifegain triggers
• Infinite mana permanents you control can produce
• Infinite untap of permanents you control