Endless Cockroaches + Deathrender + Viscera Seer

Endless Cockroaches

Deathrender

Viscera Seer

How it works

1. Activate Viscera Seer by sacrificing Endless Cockroaches.
2. Endless Cockroaches dies, triggering itself and Deathrender.
3. Resolve the Endless Cockroaches trigger, returning it from your graveyard to your hand.
4. Resolve the Deathrender trigger, putting Endless Cockroaches onto the battlefield from your hand, and attaching Deathrender to it.
5. Resolve the Viscera Seer ability from step 1, causing you to scry 1.
6. Repeat.