Confidence:StrongSolidPlausibleTentativeSpeculative

• Helping Hand

  W

  SorceryW

  Helping Hand puts Merciless Eternal onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Unearth

  B

  SorceryB

  Unearth puts Merciless Eternal onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Labyrinth Raptor

  BR

  Creature — Nightmare DinosaurBR

  Both cards trigger when a permanent blocks — they fire together.
• Laccolith Rig

  R

  Enchantment — AuraR

  Both cards trigger when a permanent blocks — they fire together.
• Grazilaxx, Illithid Scholar

  1UU

  Legendary Creature — HorrorU

  Both cards trigger when a permanent blocks — they fire together.
• Simian Sling

  R

  Artifact Creature — Equipment MonkeyR

  Both cards trigger when a permanent blocks — they fire together.
• Dwindle

  2U

  Enchantment — AuraU

  Both cards trigger when a permanent blocks — they fire together.
• Powerstone Minefield

  2RW

  EnchantmentRW

  Both cards trigger when a permanent blocks — they fire together.
• Trailblazer's Torch

  4

  Artifact — EquipmentC

  Both cards trigger when a permanent blocks — they fire together.
• Delney, Streetwise Lookout

  2W

  Legendary Creature — Human ScoutW

  Delney, Streetwise Lookout makes Merciless Eternal's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Mirror Shield

  2

  Artifact — EquipmentC

  Both cards trigger when a permanent blocks — they fire together.
• Roaming Throne

  4

  Artifact Creature — GolemC

  Roaming Throne makes Merciless Eternal's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Primal Cocoon

  G

  Enchantment — AuraG

  Both cards trigger when a permanent blocks — they fire together.
• Nivea, Beloved Battlemage

  2W

  Legendary Creature — Human Wizard WarriorW

  Both cards trigger when a permanent blocks — they fire together.
• Mirror Room // Fractured Realm

  2U5UU

  Enchantment — Room // Enchantment — RoomU

  Mirror Room makes Merciless Eternal's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Tormentor's Helm

  R

  Artifact — EquipmentR

  Both cards trigger when a permanent blocks — they fire together.
• Infinite Authority

  WWW

  Enchantment — AuraW

  Both cards trigger when a permanent blocks — they fire together.
• No Quarter

  3R

  EnchantmentR

  Both cards trigger when a permanent blocks — they fire together.
• Norin, Swift Survivalist

  R

  Legendary Creature — Human CowardR

  Both cards trigger when a permanent blocks — they fire together.
• Perimeter Captain

  W

  Creature — Human SoldierW

  Both cards trigger when a permanent blocks — they fire together.
• Godsend

  1WW

  Legendary Artifact — EquipmentW

  Both cards trigger when a permanent blocks — they fire together.
• Wizard's Staff

  1U

  Artifact — EquipmentU

  Wizard's Staff makes Merciless Eternal's triggered ability trigger an additional time — each time it fires, you get it twice. Value, not a loop.
• Gustcloak Savior

  4W

  Creature — Bird SoldierW

  Both cards trigger when a permanent blocks — they fire together.
• Hezrou // Demonic Stench

  5BBB

  Creature — Frog Demon // Instant — AdventureB

  Both cards trigger when a permanent blocks — they fire together.
• Cunning

  1U

  Enchantment — AuraU

  Both cards trigger when a permanent blocks — they fire together.