Whisper, Blood Liturgist + Necrotic Ooze + Black Carriage + Abhorrent Overlord

Prerequisites

• Necrotic Ooze does not have summoning sickness.
• You control at least two additional creatures.
• It is your upkeep.

Steps

1. 1During your upkeep, activate Necrotic Ooze using Whisper's ability by tapping it and sacrificing two other creatures, returning Abhorrent Overlord from your graveyard to the battlefield.
2. 2When Abhorrent Overlord enters the battlefield, its first ability triggers, creating at least four 1/1 Harpy creature tokens.
3. 3Activate Necrotic Ooze using Black Carriage's ability by sacrificing Abhorrent Overlord, untapping Necrotic Ooze.
4. 4Repeat.

Effects

• Infinite creature ETB
• Infinite creature LTB
• Infinite creature sacrifice triggers
• Infinite creature tokens
• Infinite death triggers
• Return all creature cards from your graveyard to the battlefield