Confidence:StrongSolidPlausibleTentativeSpeculative

• Raggadragga, Goreguts Boss

  2RG

  Legendary Creature — Human BoarGR

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• 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.
• Paradox Engine

  5

  Legendary ArtifactC

  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.
• Hematite Talisman

  2

  ArtifactC

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Lapis Lazuli Talisman

  2

  ArtifactC

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Malachite Talisman

  2

  ArtifactC

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Nacre Talisman

  2

  ArtifactC

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Onyx Talisman

  2

  ArtifactC

  Untap loop: each side can untap what the other taps — a genuine mutual refresh engine.
• Copperhorn Scout

  G

  Creature — Elf ScoutG

  Copperhorn Scout untaps all (or many) permanents, refreshing Hedron Detonator's tap activation.
• Tezzeret, Cruel Captain

  3

  Legendary Planeswalker — TezzeretC

  Both cards trigger when a creature enters the battlefield — they fire together.
• Lagrella, the Magpie

  GWU

  Legendary Creature — Human SoldierGUW

  Both cards trigger when a creature enters the battlefield — they fire together.
• White Plume Adventurer

  2W

  Creature — Orc ClericW

  White Plume Adventurer untaps all (or many) permanents, refreshing Hedron Detonator's tap activation.
• April O'Neil, Live on the Scene

  1U

  Legendary Creature — Human DetectiveU

  Both cards trigger when a creature enters the battlefield — they fire together.
• Elvish Archivist

  1G

  Creature — Elf ArtificerG

  Both cards trigger when a creature enters the battlefield — they fire together.
• Prowl, Stoic Strategist // Prowl, Pursuit Vehicle

  3W

  Legendary Artifact Creature — Robot // Legendary Artifact — VehicleW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Jace, Ingenious Mind-Mage

  4UU

  Legendary Planeswalker — JaceU

  Jace, Ingenious Mind-Mage untaps all (or many) permanents, refreshing Hedron Detonator's tap activation.
• Sarinth Steelseeker

  1G

  Creature — Human Artificer ScoutG

  Both cards trigger when a creature enters the battlefield — they fire together.
• Aggravated Assault

  2R

  EnchantmentR

  Aggravated Assault untaps all (or many) permanents, refreshing Hedron Detonator's tap activation.
• Tetzin, Gnome Champion // The Golden-Gear Colossus

  URW

  Legendary Artifact Creature — Gnome // Legendary Artifact Creature — GnomeRUW

  Both cards trigger when a creature enters the battlefield — they fire together.
• The Thirteenth Doctor

  1GU

  Legendary Creature — Time Lord DoctorGU

  The Thirteenth Doctor untaps all (or many) permanents, refreshing Hedron Detonator's tap activation.
• Veteran Beastrider

  1GW

  Creature — Human KnightGW

  Veteran Beastrider untaps all (or many) permanents, refreshing Hedron Detonator's tap activation.
• Tome of Legends

  2

  Artifact — BookC

  Both cards trigger when a creature enters the battlefield — they fire together.
• Intruder Alarm

  2U

  EnchantmentU

  Intruder Alarm untaps all (or many) permanents, refreshing Hedron Detonator's tap activation.
• Merry, Warden of Isengard

  1GW

  Legendary Creature — Halfling AdvisorGW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Drumbellower

  2W

  Creature — SpiritW

  Drumbellower untaps all (or many) permanents, refreshing Hedron Detonator's tap activation.

• WithNacre Talisman2C

  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:

  Kingpin, Wilson Fisk3B
  Show cards
• WithLapis Lazuli Talisman2C

  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:

  Kingpin, Wilson Fisk3B
  Show cards
• WithMalachite Talisman2C

  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:

  Kingpin, Wilson Fisk3B
  Show cards
• WithHematite Talisman2C

  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:

  Kingpin, Wilson Fisk3B
  Show cards
• WithOnyx Talisman2C

  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:

  Kingpin, Wilson Fisk3B
  Show cards
• WithRaggadragga, Goreguts Boss2RGGR

  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:

  Kingpin, Wilson Fisk3B
  Show cards