Confidence:StrongSolidPlausibleTentativeSpeculative

• Saryth, the Viper's Fang

  2GG

  Legendary Creature — Human WarlockG

  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.
• Bumi, Unleashed

  3RG

  Legendary Creature — Human Noble AllyGR

  Bumi, Unleashed untaps all (or many) permanents, refreshing Forlorn Flats's tap activation.
• Wilderness Reclamation

  3G

  EnchantmentG

  Wilderness Reclamation untaps all (or many) permanents, refreshing Forlorn Flats's tap activation.
• Sword of Feast and Famine

  3

  Artifact — EquipmentC

  Sword of Feast and Famine untaps all (or many) permanents, refreshing Forlorn Flats's tap activation.
• Beledros Witherbloom

  5BG

  Legendary Creature — Elder DragonBG

  Beledros Witherbloom untaps all (or many) permanents, refreshing Forlorn Flats's tap activation.
• Emrakul, the Exigent Doom

  10

  Legendary Creature — EldraziC

  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.
• Hope Tender

  1G

  Creature — Human DruidG

  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.
• Nature's Will

  2GG

  EnchantmentG

  Nature's Will untaps all (or many) permanents, refreshing Forlorn Flats's tap activation.
• Deserted Temple

  LandC

  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.
• Fall of the Thran

  5W

  Enchantment — SagaW

  Fall of the Thran returns creatures from the graveyard to the battlefield, re-firing Forlorn Flats's enter-the-battlefield effect.
• Bonny Pall, Clearcutter

  3GUU

  Legendary Creature — Giant ScoutGU

  Bonny Pall, Clearcutter returns creatures from the graveyard to the battlefield, re-firing Forlorn Flats's enter-the-battlefield effect.
• Teval, the Balanced Scale

  1BGU

  Legendary Creature — Spirit DragonBGU

  Teval, the Balanced Scale returns creatures from the graveyard to the battlefield, re-firing Forlorn Flats's enter-the-battlefield effect.
• Blossoming Tortoise

  2GG

  Creature — TurtleG

  Blossoming Tortoise returns creatures from the graveyard to the battlefield, re-firing Forlorn Flats's enter-the-battlefield effect.
• Squall, SeeD Mercenary

  2WB

  Legendary Creature — Human Knight MercenaryBW

  Squall, SeeD Mercenary returns creatures from the graveyard to the battlefield, re-firing Forlorn Flats's enter-the-battlefield effect.
• Titania, Protector of Argoth

  3GG

  Legendary Creature — ElementalG

  Titania, Protector of Argoth returns creatures from the graveyard to the battlefield, re-firing Forlorn Flats's enter-the-battlefield effect.
• Deeproot Wayfinder

  1G

  Creature — Merfolk ScoutG

  Deeproot Wayfinder returns creatures from the graveyard to the battlefield, re-firing Forlorn Flats's enter-the-battlefield effect.
• Zacama, Primal Calamity

  6RGW

  Legendary Creature — Elder DinosaurGRW

  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.
• Waking the Trolls

  4RG

  Enchantment — SagaGR

  Waking the Trolls returns creatures from the graveyard to the battlefield, re-firing Forlorn Flats's enter-the-battlefield effect.
• Undergrowth Recon

  1GG

  EnchantmentG

  Undergrowth Recon returns creatures from the graveyard to the battlefield, re-firing Forlorn Flats's enter-the-battlefield effect.
• Summon: Titan

  3GG

  Enchantment Creature — Saga GiantG

  Summon: Titan returns creatures from the graveyard to the battlefield, re-firing Forlorn Flats's enter-the-battlefield effect.
• Roll-Roll-Roll-Roll

  2U

  Enchantment — SagaU

  Roll-Roll-Roll-Roll blinks (exiles and returns) a permanent, re-firing Forlorn Flats's enter-the-battlefield effect.
• Flickerwisp

  1WW

  Creature — ElementalW

  Flickerwisp blinks (exiles and returns) a permanent, re-firing Forlorn Flats's enter-the-battlefield effect.
• Wary Zone Guard

  2G

  Creature — Human SurvivorG

  Wary Zone Guard returns creatures from the graveyard to the battlefield, re-firing Forlorn Flats's enter-the-battlefield effect.
• The Mending of Dominaria

  3GG

  Enchantment — SagaG

  The Mending of Dominaria returns creatures from the graveyard to the battlefield, re-firing Forlorn Flats's enter-the-battlefield effect.
• Silver Surfer, Cosmic Voyager

  4UU

  Legendary Creature — Alien HeroU

  Silver Surfer, Cosmic Voyager blinks (exiles and returns) a permanent, re-firing Forlorn Flats's enter-the-battlefield effect.