Orah, Skyclave Hierophant, Thornbite Staff, and Whisper, Blood Liturgist

Prerequisites

• Orah, Skyclave Hierophant on the battlefield
• Thornbite Staff on the battlefield
• Whisper, Blood Liturgist on the battlefield
• Whisper does not have summoning sickness
• Thornbite Staff attached to Whisper
• You control two additional Cleric creatures with different mana values
• An additional Cleric creature card in the graveyard with a higher mana value than the other two

Steps

1. Activate Whisper using its own ability by tapping it and sacrificing your two additional Cleric creatures
2. Whisper's ability from Thornbite Staff triggers twice and Orah triggers twice, but one of Orah's triggers has no valid target
3. Resolve one Whisper trigger, untapping Whisper
4. Resolve Orah's trigger, returning the sacrificed Cleric with the lowest mana value from your graveyard to the battlefield
5. Resolve Whisper's ability, returning the Cleric with the highest mana value from your graveyard to the battlefield
6. Activate Whisper using its own ability by tapping it and sacrificing your two additional Cleric creatures
7. Whisper's ability from Thornbite Staff triggers twice and Orah triggers twice
8. Resolve one Whisper trigger, untapping Whisper
9. Resolve both Orah triggers, returning two Cleric creatures from your graveyard to the battlefield
10. Resolve Whisper's ability, returning any creature from your graveyard to the battlefield
11. Repeat any number of times
12. Once you have no non-Cleric creature cards in your graveyard, you may choose the same Cleric with both Orah triggers in step 7 to avoid running out of valid Whisper targets, or you may sacrifice a non-Cleric creature to Whisper
13. Resolve all Whisper triggers from the Thornbite Staff ability, untapping Whisper any number of times

Results

• Infinite blinking of non-Whisper creatures you control and creatures in your graveyard
• Infinite death triggers
• Infinite ETB
• Infinite LTB
• Infinite sacrifice triggers
• Return all creatures from your graveyard to the battlefield any number of times