Confidence:StrongSolidPlausibleTentativeSpeculative

• Ratchet, Field Medic // Ratchet, Rescue Racer

  2W

  Legendary Artifact Creature — Robot // Legendary Artifact — VehicleW

  Damage + lifelink: lifelink converts damage on one side into life triggers the partner pays off — the canonical Heliod / Karlov family.
• Sphinx of the Revelation

  3WU

  Artifact Creature — SphinxUW

  Damage + lifelink: lifelink converts damage on one side into life triggers the partner pays off — the canonical Heliod / Karlov family.
• Greasefang, Okiba Boss

  1WB

  Legendary Creature — Rat PilotBW

  Greasefang, Okiba Boss returns creatures from the graveyard to the battlefield, re-firing Aethersphere Harvester's enter-the-battlefield effect.
• The Eternal Wanderer

  4WW

  Legendary PlaneswalkerW

  The Eternal Wanderer blinks (exiles and returns) a permanent, re-firing Aethersphere Harvester's enter-the-battlefield effect.
• Jolted Awake

  W

  SorceryW

  Jolted Awake returns creatures from the graveyard to the battlefield, re-firing Aethersphere Harvester's enter-the-battlefield effect.
• Phelia, Exuberant Shepherd

  1W

  Legendary Creature — DogW

  Phelia, Exuberant Shepherd blinks (exiles and returns) a permanent, re-firing Aethersphere Harvester's enter-the-battlefield effect.
• Amalia Benavides Aguirre

  WB

  Legendary Creature — Vampire ScoutBW

  Aethersphere Harvester grants lifelink, converting Amalia Benavides Aguirre's damage into life-gain triggers.
• Professor Dellian Fel

  2BG

  Legendary Planeswalker — DellianBG

  Aethersphere Harvester grants lifelink, converting Professor Dellian Fel's damage into life-gain triggers.
• Goblin Engineer

  1R

  Creature — Goblin ArtificerR

  Goblin Engineer returns creatures from the graveyard to the battlefield, re-firing Aethersphere Harvester's enter-the-battlefield effect.
• Explosive Getaway

  3RW

  SorceryRW

  Explosive Getaway blinks (exiles and returns) a permanent, re-firing Aethersphere Harvester's enter-the-battlefield effect.
• The Mighty Thor, Jane Foster

  1WU

  Legendary Creature — Human God HeroUW

  The Mighty Thor, Jane Foster blinks (exiles and returns) a permanent, re-firing Aethersphere Harvester's enter-the-battlefield effect.
• Prize Pig

  1G

  Creature — BoarG

  Aethersphere Harvester grants lifelink, converting Prize Pig's damage into life-gain triggers.
• Aerial Extortionist

  3WW

  Creature — Bird SoldierW

  Aerial Extortionist exiles a permanent and lets its owner cast it again — the recast fires Aethersphere Harvester's cast trigger or its enter-the-battlefield effect.
• Nazar, the Velvet Fang

  3B

  Legendary Creature — Vampire WarlockB

  Aethersphere Harvester grants lifelink, converting Nazar, the Velvet Fang's damage into life-gain triggers.
• Kwia Vigorbloom

  3GWW

  Legendary Creature — Elder SphinxGW

  Aethersphere Harvester grants lifelink, converting Kwia Vigorbloom's damage into life-gain triggers.
• What Must Be Done

  3WW

  SorceryW

  What Must Be Done returns creatures from the graveyard to the battlefield, re-firing Aethersphere Harvester's enter-the-battlefield effect.
• The Mind Stone

  1W

  Legendary Artifact — Infinity StoneW

  The Mind Stone blinks (exiles and returns) a permanent, re-firing Aethersphere Harvester's enter-the-battlefield effect.
• Starscape Cleric

  1B

  Creature — Bat ClericB

  Aethersphere Harvester grants lifelink, converting Starscape Cleric's damage into life-gain triggers.
• Elrond, Moon-Reader

  2U

  Legendary Creature — Elf NobleU

  Elrond, Moon-Reader blinks (exiles and returns) a permanent, re-firing Aethersphere Harvester's enter-the-battlefield effect.
• Trudge Garden

  2G

  EnchantmentG

  Aethersphere Harvester grants lifelink, converting Trudge Garden's damage into life-gain triggers.
• Don & Leo, Problem Solvers

  3W/UW/U

  Legendary Creature — Mutant Ninja TurtleUW

  Don & Leo, Problem Solvers blinks (exiles and returns) a permanent, re-firing Aethersphere Harvester's enter-the-battlefield effect.
• Temporal Tribulation

  2U

  InstantU

  Temporal Tribulation blinks (exiles and returns) a permanent, re-firing Aethersphere Harvester's enter-the-battlefield effect.
• Recommission

  1W

  SorceryW

  Recommission returns creatures from the graveyard to the battlefield, re-firing Aethersphere Harvester's enter-the-battlefield effect.
• Ajani, Strength of the Pride

  2WW

  Legendary Planeswalker — AjaniW

  Aethersphere Harvester grants lifelink, converting Ajani, Strength of the Pride's damage into life-gain triggers.
• Karlov of the Ghost Council

  WB

  Legendary Creature — Spirit AdvisorBW

  Aethersphere Harvester grants lifelink, converting Karlov of the Ghost Council's damage into life-gain triggers.