Ashnod's Altar + Nim Deathmantle + Drizzt Do'Urden + Dual Nature

Ashnod's Altar

Nim Deathmantle

Drizzt Do'Urden

Dual Nature

How it works

1. Activate Ashnod's Altar by sacrificing Drizzt, adding CC.
2. Nim Deathmantle triggers.
3. Pay 4 for the Nim Deathmantle trigger, returning Drizzt to the battlefield and attaching Nim Deathmantle to it.
4. Drizzt and Dual Nature trigger.
5. Resolve the Drizzt trigger, creating a legendary Cat creature token.
6. Activate Ashnod's Altar by sacrificing the Cat creature token, adding CC.
7. Drizzt triggers, putting a number of +1/+1 counters on Drizzt equal to the difference .
8. Repeat.
9. Once you have infinite Dual Nature triggers on the stack, resolve each one, creating a token copy of Drizzt.
10. The token copy of Drizzt triggers.
11. The token copy of Drizzt is put into your graveyard due to the legend rule.
12. Resolve the Drizzt trigger, putting a legendary Cat token onto the battlefield.
13. Activate Ashnod's Altar by sacrificing the Cat token, adding CC.
14. Repeat until there are no Dual Nature triggers remaining.