Prerequisites
- Dualcaster Mage in hand
- Black Sun's Twilight in hand
- Yahenni, Undying Partisan on the battlefield
- available
Steps
- Cast Black Sun's Twilight by paying , optionally choosing to target a creature
- Holding priority, cast Dualcaster Mage by paying
- When Dualcaster Mage enters the battlefield, it triggers, copying Black Sun's Twilight, optionally choosing to target a creature
- Holding priority, activate Yahenni by sacrificing Dualcaster Mage
- Resolve the copy of Black Sun's Twilight, giving up to one creature -5/-5 until end of turn and returning Dualcaster Mage from your graveyard to the battlefield
- Repeat from step 3
Results
- Infinite LTB
- Infinite ETB
- Infinite sacrifice triggers
- Infinite death triggers
- Infinite magecraft triggers
- Reduce any number of target creatures' toughness to zero
Required Cards 3
Dualcaster Mage
Creature — Human Wizard
Black Sun's Twilight
Instant
Yahenni, Undying Partisan
Legendary Creature — Aetherborn Vampire