Carmen, Cruel Skymarcher + Leonin Relic-Warder + All-Out Assault + Phantom Train

Carmen, Cruel Skymarcher

Leonin Relic-Warder

All-Out Assault

Phantom Train

How it works

1. Cast All-Out Assault by paying 2.
2. When All-Out Assault enters the battlefield, it triggers, causing you to get an additional combat and main phase after this one.
3. Move to your extra combat phase. All-Out Assault triggers, untapping each creature you control.
4. Declare Carmen as an attacker, triggering its second ability, returning Leonin Relic-Warder form your graveyard to the battlefield.
5. When Leonin Relic-Warder enters the battlefield, its first ability triggers, exiling All-Out Assault.
6. Move to your postcombat main phase, and activate Phantom Train by sacrificing Leonin Relic-Warder.
7. When Leonin Relic-Warder dies, its second ability and Carmen's first ability trigger.
8. Resolve the Carmen trigger, putting a +1/+1 counter on it and causing you to gain 1 life.
9. Resolve the Leonin Relic-Warder trigger, returning All-Out Assault from exile to the battlefield.
10. When All-Out Assault enters the battlefield, it triggers, causing you to get an additional combat and main phase after this one.
11. Resolve the Phantom Train ability.
12. Repeat from step 3.

This loop relies on the brilliant interaction between All-Out Assault and Leonin Relic-Warder to continually reset your combat phases and retrigger entry abilities. When you declare Carmen, Cruel Skymarcher as an attacker, her attack trigger brings back Leonin Relic-Warder, which immediately exiles All-Out Assault. By using Phantom Train to sacrifice Leonin Relic-Warder, you trigger its departure ability to return All-Out Assault to the battlefield—which simultaneously triggers Carmen, Cruel Skymarcher's sacrifice-buffing ability and grants you another fresh combat phase via All-Out Assault's entry trigger. Repeating this cycle lets you continuously farm death triggers, lifegain, and combat steps while your aggressive board state snowballs out of control.