Mikaeus, the Unhallowed + Ashcloud Phoenix + Woe Strider

Mikaeus, the Unhallowed

Ashcloud Phoenix

Woe Strider

How it works

1. Activate Woe Strider 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 Woe Strider 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 Woe Strider abilities from steps 1 and 5, causing you to scry 1 twice.
8. Repeat.