Whisper, Blood Liturgist, Body Double, Thousand-Year Elixir, and Xathrid Necromancer

Prerequisites

• Whisper, Blood Liturgist on the battlefield
• Body Double in the graveyard
• Thousand-Year Elixir on the battlefield
• Xathrid Necromancer on the battlefield
• You control at least one additional creature

Steps

1. Activate Whisper by tapping it, sacrificing itself and any other creature you control, targeting Body Double
2. Xathrid Necromancer triggers, creating at least one 2/2 Zombie creature token
3. Resolve the Whisper ability, returning Body Double from your graveyard to the battlefield as a copy of Whisper
4. Activate Body Double by tapping it, sacrificing itself and the Zombie token, targeting Whisper
5. Xathrid Necromancer triggers, creating a 2/2 Zombie creature token
6. Resolve the Body Double ability, returning Whisper from your graveyard to the battlefield
7. Repeat

Results

• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers