Confidence:StrongSolidPlausibleTentativeSpeculative

• Otharri, Suns' Glory

  3RW

  Legendary Creature — PhoenixRW

  Both cards produce the same kind of effect (shared token subtype).
• Goldwardens' Gambit

  6RR

  SorceryR

  Both cards produce the same kind of effect (shared token subtype).
• The Eternal Wanderer

  4WW

  Legendary PlaneswalkerW

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

  W

  SorceryW

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

  1W

  Legendary Creature — DogW

  Phelia, Exuberant Shepherd blinks (exiles and returns) a permanent, re-firing Hexgold Halberd's enter-the-battlefield effect.
• Goblin Engineer

  1R

  Creature — Goblin ArtificerR

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

  3RW

  SorceryRW

  Explosive Getaway blinks (exiles and returns) a permanent, re-firing Hexgold Halberd'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 Hexgold Halberd's enter-the-battlefield effect.
• Aerial Extortionist

  3WW

  Creature — Bird SoldierW

  Aerial Extortionist exiles a permanent and lets its owner cast it again — the recast fires Hexgold Halberd's cast trigger or its enter-the-battlefield effect.
• What Must Be Done

  3WW

  SorceryW

  What Must Be Done returns creatures from the graveyard to the battlefield, re-firing Hexgold Halberd's enter-the-battlefield effect.
• Glimmer Lens

  1W

  Artifact — EquipmentW

  Both cards produce the same kind of effect (shared token subtype).
• The Mind Stone

  1W

  Legendary Artifact — Infinity StoneW

  The Mind Stone blinks (exiles and returns) a permanent, re-firing Hexgold Halberd's enter-the-battlefield effect.
• Elrond, Moon-Reader

  2U

  Legendary Creature — Elf NobleU

  Elrond, Moon-Reader blinks (exiles and returns) a permanent, re-firing Hexgold Halberd's enter-the-battlefield effect.
• Don & Leo, Problem Solvers

  3W/UW/U

  Legendary Creature — Mutant Ninja TurtleUW

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

  2U

  InstantU

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

  1W

  SorceryW

  Recommission returns creatures from the graveyard to the battlefield, re-firing Hexgold Halberd's enter-the-battlefield effect.
• Goblin Welder

  R

  Creature — Goblin ArtificerR

  Goblin Welder returns creatures from the graveyard to the battlefield, re-firing Hexgold Halberd's enter-the-battlefield effect.
• Nahiri's Resolve

  3RW

  EnchantmentRW

  Nahiri's Resolve blinks (exiles and returns) a permanent, re-firing Hexgold Halberd's enter-the-battlefield effect.
• Tameshi, Reality Architect

  2U

  Legendary Creature — Moonfolk WizardUW

  Tameshi, Reality Architect returns creatures from the graveyard to the battlefield, re-firing Hexgold Halberd's enter-the-battlefield effect.
• Lorehold Charm

  RW

  InstantRW

  Lorehold Charm returns creatures from the graveyard to the battlefield, re-firing Hexgold Halberd's enter-the-battlefield effect.
• The Legend of Yangchen // Avatar Yangchen

  3WW

  Enchantment — Saga // Legendary Creature — AvatarW

  The Legend of Yangchen exiles a permanent and lets its owner cast it again — the recast fires Hexgold Halberd's cast trigger or its enter-the-battlefield effect.
• Soul Partition

  1W

  InstantW

  Soul Partition exiles a permanent and lets its owner cast it again — the recast fires Hexgold Halberd's cast trigger or its enter-the-battlefield effect.
• Appa, Steadfast Guardian

  2WW

  Legendary Creature — Bison AllyW

  Appa, Steadfast Guardian exiles a permanent and lets its owner cast it again — the recast fires Hexgold Halberd's cast trigger or its enter-the-battlefield effect.
• Teferi's Time Twist

  1U

  InstantU

  Teferi's Time Twist blinks (exiles and returns) a permanent, re-firing Hexgold Halberd's enter-the-battlefield effect.
• Barbed Batterfist

  1R

  Artifact — EquipmentR

  Both cards produce the same kind of effect (shared token subtype).