Confidence:StrongSolidPlausibleTentativeSpeculative

• Reanimate

  B

  SorceryB

  Reanimate puts Mushroom Watchdogs onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Helping Hand

  W

  SorceryW

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

  B

  SorceryB

  Unearth puts Mushroom Watchdogs onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Grave Researcher // Reanimate

  2BB

  Creature — Troll Warlock // SorceryB

  Grave Researcher puts Mushroom Watchdogs onto the battlefield from a graveyard without casting it, so its mana cost is never paid.
• Nutrient Block

  1

  Artifact — FoodC

  Mushroom Watchdogs is a sacrifice outlet, enabling Nutrient Block's death or sacrifice trigger.
• Ultron the Annihilator

  3BB

  Legendary Artifact Creature — Robot VillainB

  Mushroom Watchdogs is a sacrifice outlet, enabling Ultron the Annihilator's death or sacrifice trigger.
• Marionette Apprentice

  1B

  Creature — Human ArtificerB

  Mushroom Watchdogs is a sacrifice outlet, enabling Marionette Apprentice's death or sacrifice trigger.
• Biotech Specialist

  RG

  Creature — Insect ScientistGR

  Mushroom Watchdogs is a sacrifice outlet, enabling Biotech Specialist's death or sacrifice trigger.
• Elrond, Moon-Reader

  2U

  Legendary Creature — Elf NobleU

  Mushroom Watchdogs has activated abilities that aren't mana abilities, fueling Elrond, Moon-Reader's activation-trigger.
• Exuberant Fuseling

  R

  Creature — Phyrexian Goblin WarriorR

  Mushroom Watchdogs is a sacrifice outlet, enabling Exuberant Fuseling's death or sacrifice trigger.
• Skittering Precursor

  2R

  Creature — Eldrazi DroneR

  Mushroom Watchdogs is a sacrifice outlet, enabling Skittering Precursor's death or sacrifice trigger.
• Shard of the Void Dragon

  4BBB

  Creature — C'tanB

  Mushroom Watchdogs is a sacrifice outlet, enabling Shard of the Void Dragon's death or sacrifice trigger.
• Ravenous Squirrel

  B/G

  Creature — SquirrelBG

  Mushroom Watchdogs is a sacrifice outlet, enabling Ravenous Squirrel's death or sacrifice trigger.
• Heaped Harvest

  2G

  Artifact — FoodG

  Mushroom Watchdogs is a sacrifice outlet, enabling Heaped Harvest's death or sacrifice trigger.
• Judge Magister Gabranth

  WB

  Legendary Creature — Human Advisor KnightBW

  Mushroom Watchdogs is a sacrifice outlet, enabling Judge Magister Gabranth's death or sacrifice trigger.
• Evendo Brushrazer

  2R

  Creature — Insect WarriorR

  Mushroom Watchdogs is a sacrifice outlet, enabling Evendo Brushrazer's death or sacrifice trigger.
• Magnetic Snuffler

  5

  Artifact Creature — ConstructC

  Mushroom Watchdogs is a sacrifice outlet, enabling Magnetic Snuffler's death or sacrifice trigger.
• Susurian Voidborn

  2B

  Creature — Vampire SoldierB

  Mushroom Watchdogs is a sacrifice outlet, enabling Susurian Voidborn's death or sacrifice trigger.
• Disciple of the Vault

  B

  Creature — Human ClericB

  Mushroom Watchdogs is a sacrifice outlet, enabling Disciple of the Vault's death or sacrifice trigger.
• Donatello, Mutant Mechanic

  3U

  Legendary Creature — Mutant Ninja TurtleU

  Mushroom Watchdogs is a sacrifice outlet, enabling Donatello, Mutant Mechanic's death or sacrifice trigger.
• Al Bhed Salvagers

  2B

  Creature — Human Artificer WarriorB

  Mushroom Watchdogs is a sacrifice outlet, enabling Al Bhed Salvagers's death or sacrifice trigger.
• Lightless Evangel

  1B

  Creature — Vampire ClericB

  Mushroom Watchdogs is a sacrifice outlet, enabling Lightless Evangel's death or sacrifice trigger.
• Lembas

  2

  Artifact — FoodC

  Mushroom Watchdogs is a sacrifice outlet, enabling Lembas's death or sacrifice trigger.
• Popular Egotist

  2B

  Creature — Human RogueB

  Mushroom Watchdogs is a sacrifice outlet, enabling Popular Egotist's death or sacrifice trigger.
• Agent of the Iron Throne

  2B

  Legendary Enchantment — BackgroundB

  Mushroom Watchdogs is a sacrifice outlet, enabling Agent of the Iron Throne's death or sacrifice trigger.