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

Prerequisites

• Whisper, Blood Liturgist in the graveyard
• Necrotic Ooze on the battlefield
• Black Carriage in the graveyard
• Abhorrent Overlord in the graveyard
• Necrotic Ooze does not have summoning sickness
• You control at least two additional creatures
• It is your upkeep

Steps

1. During 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. When Abhorrent Overlord enters the battlefield, its first ability triggers, creating at least four 1/1 Harpy creature tokens
3. Activate Necrotic Ooze using Black Carriage's ability by sacrificing Abhorrent Overlord, untapping Necrotic Ooze
4. Repeat

Results

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