The Chain Veil + Ashnod's Altar + Teferi, Who Slows the Sunset + Elspeth, Sun's Champion
Produces: Infinite activations of most planeswalkers, Infinite colorless mana, Infinite creature tokens, Infinite death triggers, Infinite creature ETB, Infinite lifegain, Infinite lifegain triggers, Infinite creature LTB, Infinite mana creatures you control can produce, Infinite mana lands you control can produce, Infinite mana permanents you control can produce, Infinite creature sacrifice triggers, Infinite untap of creatures and lands you control
- The Chain Veil
- Ashnod's Altar
- Teferi, Who Slows the Sunset
- Elspeth, Sun's Champion
- Color identity
- WU
Steps
- Activate Elspeth's first loyalty ability by putting two loyalty counters on it, creating three 1/1 Soldier creature tokens.
- Activate Ashnod's Altar twice by sacrificing two Soldiers, adding {C}{C}{C}{C}.
- Activate The Chain Veil by paying {4} and tapping it, allowing an extra activation of your planeswalkers' loyalty abilities this turn.
- Activate Teferi's first loyalty ability by putting a loyalty counter on it, untapping The Chain Veil and up to other other creature and/or land you control, and causing you to gain 2 life.
- Repeat.
How to execute this combo
The "The Chain Veil + Ashnod's Altar + Teferi, Who Slows the Sunset + Elspeth, Sun's Champion" combo takes 5 steps in order. Make sure you have the mana open and permanents listed in the prerequisites before you start — opponents can respond between steps.
The end result: Infinite activations of most planeswalkers, Infinite colorless mana, Infinite creature tokens, Infinite death triggers, Infinite creature ETB, Infinite lifegain, Infinite lifegain triggers, Infinite creature LTB, Infinite mana creatures you control can produce, Infinite mana lands you control can produce, Infinite mana permanents you control can produce, Infinite creature sacrifice triggers, Infinite untap of creatures and lands you control.
Practice the line offline: lay out the cards, walk through each step, and note where you can lose the combo (summoning sickness, lack of priority, removal on a key permanent). In game, announce each step clearly; in casual play you can offer to shortcut after demonstrating the loop.
The best window is a turn when opponents are tapped out or after they commit a spell — hold protection (a counter, Vexing Shusher) if the combo wins on the spot.