Necrotic Ooze + Whisper, Blood Liturgist + Altar Golem + Abhorrent Overlord + Marionette Master

Necrotic Ooze

Whisper, Blood Liturgist

Altar Golem

Abhorrent Overlord

Marionette Master

How it works

1. Tap Necrotic Ooze using Whisper, Blood Liturgist's ability to sacrifice two creatures and return Abhorrent Overlord to battlefield.
2. Abhorrent Overlord's ETB triggers, creating at least 5 creature tokens.
3. Using Altar Golem's ability, tap Abhorrent Overlord and 4 tokens to untap Necrotic Ooze.
4. Tap Necrotic Ooze and sacrifice Abhorrent Overlord and a tapped token to Whisper's ability to return Marionetter Master to the battlefield, creating 3 Servo tokens.
5. Tap Marionette Master and the 4 untapped tokens to untap Necrotic Ooze.
6. Sacrifice Marionetter Master and a Servo token, causing target opponent to lose 1 life and reanimating Abhorrent Overlord.
7. Repeat from step 2 for infinite life loss.