Whisper, Blood Liturgist, Lena, Selfless Champion, and Thornbite Staff

Prerequisites

• Whisper, Blood Liturgist on the battlefield
• Lena, Selfless Champion on the battlefield
• Thornbite Staff on the battlefield
• You control at least three additional creatures, one of which must be nontoken
• Whisper does not have summoning sickness
• Thornbite Staff attached to Whisper

Steps

1. Activate Lena by sacrificing it
2. Lena dies, triggering Whisper, untapping Whisper
3. Resolve the Lena ability, causing creatures you control with power less than Lena's power to gain indestructible until end of turn
4. Activate Whisper by tapping it and sacrificing two other creatures
5. The creatures die, triggering Whisper twice, untapping Whisper
6. Resolve the Whisper ability from step 4, returning Lena from your graveyard to the battlefield
7. Lena enters the battlefield, creating at least three 1/1 Soldier creature tokens
8. Repeat

Results

• Infinite creature tokens
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers