Viscera Seer + Fiend Hunter + Karmic Guide

Viscera Seer

Fiend Hunter

Karmic Guide

How it works

1. Cast Fiend Hunter by paying its mana cost.
2. When Fiend Hunter enters, its first ability triggers, exiling Karmic Guide.
3. Activate Viscera Seer by sacrificing Fiend Hunter.
4. When Fiend Hunter dies, its second ability triggers, returning Karmic Guide from exile to the battlefield.
5. When Karmic Guide enters, it triggers, returning Fiend Hunter from your graveyard to the battlefield.
6. When Fiend Hunter enters, its first ability triggers, exiling Karmic Guide.
7. Resolve the Viscera Seer ability.
8. Repeat from step 3.

This elegant looping engine leverages the constant back-and-forth between Fiend Hunter and Karmic Guide to manipulate the battlefield indefinitely. By using Viscera Seer as a reliable sacrifice outlet, you send Fiend Hunter to the graveyard so its death trigger can rescue Karmic Guide from exile, which in turn brings Fiend Hunter right back to repeat the cycle. This unending loop not only generates infinite enter-the-battlefield and leave-the-battlefield triggers, but also lets you use Viscera Seer's scry ability over and over to sculpt the top of your library until you find whatever win condition you need.