Mikaeus, the Unhallowed + Ashcloud Phoenix + Viscera Seer

Mikaeus, the Unhallowed

Ashcloud Phoenix

Viscera Seer

How it works

1. Activate Viscera Seer by sacrificing Ashcloud Phoenix.
2. When Ashcloud Phoenix dies, it triggers, as well as its undying ability if it does not have a +1/+1 counter on it.
3. Resolve the first trigger, returning it from your graveyard to the battlefield face-down.
4. Resolve the second trigger, doing nothing.
5. Activate Viscera Seer by sacrificing Ashcloud Phoenix.
6. When Ashcloud Phoenix dies, it triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
7. Resolve the Viscera Seer abilities from steps 1 and 5, causing you to scry 1 twice.
8. Repeat.