The Chain Veil + Ashnod's Altar + Ral Zarek + Garruk, Cursed Huntsman

The Chain Veil

Ashnod's Altar

Ral Zarek

Garruk, Cursed Huntsman

How it works

1. Activate Garruk's first loyalty ability by putting a loyalty counter on it, creating two 2/2 Wolf creature tokens.
2. Activate Ashnod's Altar twice by sacrificing the Wolves, adding CCCC.
3. When the Wolves die, they trigger, putting two loyalty counters on each Garruk planeswalker you control.
4. Activate The Chain Veil by paying 4 and tapping it, allowing an extra activation of your planeswalkers' loyalty abilities this turn.
5. Activate Ral Zarek's first loyalty ability by putting a loyalty counter on it, untapping The Chain Veil.
6. Repeat.

This loop turns planeswalkers into a self-sustaining engine by cleverly recycling both their loyalty and their physical bodies. Garruk, Cursed Huntsman provides the raw material by churning out Wolves, which are immediately fed to Ashnod's Altar to generate the massive four mana needed to pay for The Chain Veil's activation. Every time those Wolf tokens perish, their death triggers pump Garruk's loyalty back up, ensuring he never runs out of fuel while Ral Zarek uses his untap ability to continuously refresh The Chain Veil for another round.