How can you create a combo with Ashnod the Uncaring, Apprentice Necromancer, Ruthless Knave?
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[START OF COMBO]This combo can be formed with Ashnod the Uncaring, Apprentice Necromancer, Ruthless Knave

Color identity: UBR
Mana cost: {2}{B}
Steps:
  1. Activate Ruthless Knave's first ability by paying {2}{B} and sacrificing it.
  2. Ashnod the Uncaring triggers, copying Ruthless Knave's ability.
  3. Resolve both Ruthless Knave abilities, creating four Treasure artifact tokens.
  4. Activate the four Treasures by tapping and sacrificing them, adding {2}{B}{B}.
  5. Activate Apprentice Necromancer by paying {B}, tapping and sacrificing it, targeting Ruthless Knave.
  6. Ashnod the Uncaring triggers, copying Apprentice Necromancer's ability, targeting Apprentice Necromancer.
  7. Resolve both Apprentice Necromancer abilities, returning Apprentice Necromancer and Ruthless Knave from your graveyard to the battlefield, and giving them haste until end of turn.
  8. Repeat.[END OF COMBO STEPS]

Result:
  - Infinite death triggers
  - Infinite enters the battlefield
  - Infinite leaves the battlefield
  - Infinite sacrifice triggers[END OF COMBO RESULT][END OF COMBO]

Other prerequisites:
  - All permanants must be on the battlefield
  - Apprentice Necromancer does not have summoning sickness.
[END OF COMBO PREREQUISITES]
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