Astral Dragon + Necromancy + Clever Impersonator
Astral Dragon
Necromancy
Clever Impersonator
Requires
Astral Dragon must be in the graveyard.
Necromancy must be in hand.
Clever Impersonator must be in the graveyard.
Mana needed: 
Steps
- Cast Necromancy by paying .
- When Necromancy enters the battlefield, it triggers, returning Astral Dragon from your graveyard to the battlefield, and then attaching Necromancy to Astral Dragon.
- 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.
- When the Necromancy tokens enter the battlefield, they trigger, with at least one trigger targeting Clever Impersonator.
- Resolve the first Necromancy trigger, returning Clever Impersonator from your graveyard to the battlefield as a copy of Astral Dragon, and not attaching Necromancy to Clever Impersonator due to Necromancy being a creature.
- The Necromancy Aura creature token is put into your graveyard as a state-based action due to being an Aura that is unattached.
- The Necromancy token leaves-the-battlefield ability triggers, as well as Clever Impersonator's enters-the-battlefield ability.
- Resolve the Necromancy trigger, causing you to sacrifce Clever Impersonator.
- Resolve the Clever Impersonator trigger, creating two token copies of Necromancy that are 3/3 Dragon creatures in addition to their other types.
- Repeat from step 4.
Results
Infinite death triggers. Infinite ETB. Infinite LTB. Infinite sacrifice triggers.
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