The Chain Veil + Chandra, Hope's Beacon + Chandra, Bold Pyromancer + Teferi, Timebender

The Chain Veil

Chandra, Hope's Beacon

Chandra, Bold Pyromancer

Teferi, Timebender

How it works

1. Activate Chandra, Hope's Beacon's second ability by putting two loyalty counters on it, adding two mana of any color.
2. Activate Chandra, Bold Pyromancer's first ability by putting a loyalty counter on it, adding and dealing 2 damage to a player.
3. Activate The Chain Veil by paying 4 and tapping it, allowing you an additional activation of your planeswalkers' loyalty abilities this turn.
4. Activate Teferi's first ability by putting two loyalty counters on it, untapping The Chain Veil.
5. Repeat.
6. Once you have infinite loyalty counters on Teferi, you may also use its third loyalty ability each turn to take infinite turns.