Confidence:StrongSolidPlausibleTentativeSpeculative

• Najeela, the Blade-Blossom

  2R

  Legendary Creature — Human WarriorBGRUW

  One-directional refresh: one card can untap permanents the other wants to reuse. Not self-sustaining on its own — the untapper has to keep showing up.
• Chevill, Bane of Monsters

  BG

  Legendary Creature — Human RogueBG

  Blood Aspirant produces damage that can kill creatures, enabling Chevill, Bane of Monsters's death-trigger or removal payoff.
• Bloodline Recollector // Ancestral Craving

  1BB

  Creature — Vampire Warlock // InstantB

  Blood Aspirant produces damage that can kill creatures, enabling Bloodline Recollector's death-trigger or removal payoff.
• Banon, the Returners' Leader

  RW

  Legendary Creature — Human Cleric RebelRW

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Captivating Glance

  2U

  Enchantment — AuraU

  Captivating Glance temporarily takes control of an opponent's creature, and Blood Aspirant sacrifices it — the opponent loses the permanent for good.
• The Meathook Massacre

  XBB

  Legendary EnchantmentB

  Blood Aspirant produces damage that can kill creatures, enabling The Meathook Massacre's death-trigger or removal payoff.
• Merieke Ri Berit

  WUB

  Legendary Creature — HumanBUW

  Merieke Ri Berit temporarily takes control of an opponent's creature, and Blood Aspirant sacrifices it — the opponent loses the permanent for good.
• Baloth Prime

  3G

  Creature — BeastG

  Both cards trigger when a permanent is sacrificed — they fire together.
• Invasion of New Capenna // Holy Frazzle-Cannon

  WB

  Battle — Siege // Artifact — EquipmentBW

  Both cards trigger when a permanent is sacrificed — they fire together.
• Edea, Possessed Sorceress

  2UBR

  Legendary Creature — Human WarlockBRU

  Edea, Possessed Sorceress temporarily takes control of an opponent's creature, and Blood Aspirant sacrifices it — the opponent loses the permanent for good.
• Gravecrawler

  B

  Creature — ZombieB

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Bequeathal

  G

  Enchantment — AuraG

  Blood Aspirant produces damage that can kill creatures, enabling Bequeathal's death-trigger or removal payoff.
• Kraven the Hunter

  1BG

  Legendary Creature — Human Warrior VillainBG

  Blood Aspirant produces damage that can kill creatures, enabling Kraven the Hunter's death-trigger or removal payoff.
• Varchild, Betrayer of Kjeldor

  2R

  Legendary Creature — Human KnightR

  Varchild, Betrayer of Kjeldor temporarily takes control of an opponent's creature, and Blood Aspirant sacrifices it — the opponent loses the permanent for good.
• Undead Sprinter

  BR

  Creature — ZombieBR

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Caesar, Legion's Emperor

  1RWB

  Legendary Creature — Human SoldierBRW

  Both cards trigger when a permanent is sacrificed — they fire together.
• Toshiro Umezawa

  1BB

  Legendary Creature — Human SamuraiB

  Blood Aspirant produces damage that can kill creatures, enabling Toshiro Umezawa's death-trigger or removal payoff.
• Copperhorn Scout

  G

  Creature — Elf ScoutG

  Copperhorn Scout untaps all (or many) permanents, refreshing Blood Aspirant's tap activation.
• Gorbag of Minas Morgul

  1B

  Legendary Creature — Orc SoldierB

  Both cards trigger when a permanent is sacrificed — they fire together.
• Malicious Affliction

  BB

  InstantB

  Blood Aspirant produces damage that can kill creatures, enabling Malicious Affliction's death-trigger or removal payoff.
• Timeline Culler

  BB

  Creature — Drix WarlockB

  Graveyard pair: one card brings creatures back from the graveyard repeatedly (or a creature that returns itself), and the other keeps feeding the loop — a recurring reanimator with a payoff, or a sacrifice outlet with a self-recurring creature.
• Enduring Renewal

  2WW

  EnchantmentW

  Blood Aspirant produces damage that can kill creatures, enabling Enduring Renewal's death-trigger or removal payoff.
• Garland, Royal Kidnapper

  2UB

  Legendary Creature — Human KnightBU

  Garland, Royal Kidnapper temporarily takes control of an opponent's creature, and Blood Aspirant sacrifices it — the opponent loses the permanent for good.
• Glissa, the Traitor

  BGG

  Legendary Creature — Phyrexian Zombie ElfBG

  Blood Aspirant produces damage that can kill creatures, enabling Glissa, the Traitor's death-trigger or removal payoff.
• White Plume Adventurer

  2W

  Creature — Orc ClericW

  White Plume Adventurer untaps all (or many) permanents, refreshing Blood Aspirant's tap activation.

• WithThornbite Staff2C

  Untap loop: each card untaps the other, generating arbitrary activations or mana. These two can't keep the loop going alone — add one of these to complete it:

  Baloth Prime3GAutomated Assembly Line1WGolem Foundry3Avacyn's Collar1Fishing Pole1Slayer's Plate3
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