Sakashima of a Thousand Faces, Astral Dragon, and Necromancy

Prerequisites

• Sakashima of a Thousand Faces in the graveyard
• Astral Dragon in the graveyard
• Necromancy in hand
• available

Steps

1. Cast Necromancy by paying
2. When Necromancy enters the battlefield, it triggers, returning Astral Dragon from your graveyard to the battlefield, and then attaching Necromancy to Astral Dragon
3. When Astral Dragon enters the battlefield, it triggers, creating two token copies of Necromancy that are 3/3 Dragon creatures in addition to their other types
4. When the Necromancy tokens enter the battlefield, they trigger, with at least one trigger targeting Sakashima of a Thousand Faces
5. Resolve the first Necromancy trigger, returning Sakashima of a Thousand Faces from your graveyard to the battlefield as a copy of Astral Dragon, and not attaching Necromancy to Sakashima of a Thousand Faces due to Necromancy being a creature
6. The Necromancy Aura creature token is put into your graveyard as a state-based action due to being an Aura that is unattached
7. The Necromancy token leaves-the-battlefield ability triggers, as well as Sakashima of a Thousand Faces's enters-the-battlefield ability
8. Resolve the Necromancy trigger, causing you to sacrifce Sakashima of a Thousand Faces
9. Resolve the Sakashima of a Thousand Faces trigger, creating two token copies of Necromancy that are 3/3 Dragon creatures in addition to their other types
10. Repeat from step 4

Results

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