Prowling Geistcatcher + Karmic Guide + Ashnod's Altar

Prowling Geistcatcher

Karmic Guide

Ashnod's Altar

How it works

1. Activate Ashnod's Altar by sacrificing Karmic Guide, adding CC.
2. When Karmic Guide dies, Prowling Geistcatcher's first ability triggers, exiling Karmic Guide from your graveyard.
3. Activate Ashnod's Altar by sacrificing Prowling Geistcatcher, adding CC.
4. When Prowling Geistcatcher dies, its second ability triggers, returning Karmic Guide from exile to the battlefield.
5. When Karmic Guide enters the battlefield, it triggers, returning Prowling Geistcatcher from your graveyard to the battlefield.
6. Repeat.

This elegant engine relies on a clever loop between the graveyard and the battlefield, fueled by Ashnod's Altar to continuously convert your creatures into colorless mana. Prowling Geistcatcher acts as the linchpin, stepping in to safely hide Karmic Guide away in exile whenever it dies, rather than letting it linger in the graveyard. When you then sacrifice Prowling Geistcatcher to the Altar, its departure triggers the return of Karmic Guide, which in turn brings Prowling Geistcatcher right back to life from the graveyard.