Confidence:StrongSolidPlausibleTentativeSpeculative

• Baron Helmut Zemo

  BBB

  Legendary Creature — Human Noble VillainB

  Baron Helmut Zemo creates token copies, feeding Ukkima, Stalking Shadow's ETB or copy payoff.
• Hazel of the Rootbloom

  2BG

  Legendary Creature — Squirrel DruidBG

  Ukkima, Stalking Shadow gains life in big chunks or many small hits, fueling Hazel of the Rootbloom's life-gain payoff.
• Season of Growth

  1G

  EnchantmentG

  Both cards trigger when a creature enters the battlefield — they fire together.
• Sheoldred, Whispering One

  5BB

  Legendary Creature — Phyrexian PraetorB

  Sheoldred, Whispering One returns creatures from the graveyard to the battlefield, re-firing Ukkima, Stalking Shadow's enter-the-battlefield effect.
• Springheart Nantuko

  1G

  Enchantment Creature — Insect MonkG

  Springheart Nantuko creates token copies, feeding Ukkima, Stalking Shadow's ETB or copy payoff.
• The Soul Stone

  1B

  Legendary Artifact — Infinity StoneB

  The Soul Stone returns creatures from the graveyard to the battlefield, re-firing Ukkima, Stalking Shadow's enter-the-battlefield effect.
• Spreading Plague

  4B

  EnchantmentB

  Both cards trigger when a creature enters the battlefield — they fire together.
• Tinybones Joins Up

  B

  Legendary EnchantmentB

  Both cards trigger when a creature enters the battlefield — they fire together.
• Glyph of Reincarnation

  G

  InstantG

  Glyph of Reincarnation returns creatures from the graveyard to the battlefield, re-firing Ukkima, Stalking Shadow's enter-the-battlefield effect.
• Virtue of Persistence // Locthwain Scorn

  5BB1B

  Enchantment // Sorcery — AdventureB

  Virtue of Persistence returns creatures from the graveyard to the battlefield, re-firing Ukkima, Stalking Shadow's enter-the-battlefield effect.
• Faramir, Steward of Gondor

  1WU

  Legendary Creature — Human NobleUW

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

  4BB

  Legendary Creature — Devil GodB

  Asmodeus the Archfiend bounces a permanent, enabling Ukkima, Stalking Shadow's recast / spell-cast trigger.
• Starfall Invocation

  3WW

  SorceryW

  Starfall Invocation returns creatures from the graveyard to the battlefield, re-firing Ukkima, Stalking Shadow's enter-the-battlefield effect.
• Phyrexian Purge

  2BR

  SorceryBR

  Ukkima, Stalking Shadow gains life in big chunks or many small hits, fueling Phyrexian Purge's life-gain payoff.
• Endless Evil

  2U

  Enchantment — AuraU

  Endless Evil creates token copies, feeding Ukkima, Stalking Shadow's ETB or copy payoff.
• Zero Point Ballad

  XB

  SorceryB

  Zero Point Ballad returns creatures from the graveyard to the battlefield, re-firing Ukkima, Stalking Shadow's enter-the-battlefield effect.
• Mirko, Obsessive Theorist

  1UB

  Legendary Creature — Vampire DetectiveBU

  Mirko, Obsessive Theorist returns creatures from the graveyard to the battlefield, re-firing Ukkima, Stalking Shadow's enter-the-battlefield effect.
• Reanimate

  B

  SorceryB

  Reanimate returns creatures from the graveyard to the battlefield, re-firing Ukkima, Stalking Shadow's enter-the-battlefield effect.
• Eye of Singularity

  3W

  World EnchantmentW

  Both cards trigger when a creature enters the battlefield — they fire together.
• Garruk, Curse Breaker

  3GG

  Legendary Planeswalker — GarrukG

  Both cards trigger when a creature enters the battlefield — they fire together.
• Kadena, Slinking Sorcerer

  1BGU

  Legendary Creature — Snake Wizard SorcererBGU

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

  W

  SorceryW

  Helping Hand returns creatures from the graveyard to the battlefield, re-firing Ukkima, Stalking Shadow's enter-the-battlefield effect.
• Unearth

  B

  SorceryB

  Unearth returns creatures from the graveyard to the battlefield, re-firing Ukkima, Stalking Shadow's enter-the-battlefield effect.
• Grist, Voracious Larva // Grist, the Plague Swarm

  G

  Legendary Creature — Insect // Legendary Planeswalker — GristBG

  Both cards trigger when a creature enters the battlefield — they fire together.
• Ashiok, Nightmare Muse

  3UB

  Legendary Planeswalker — AshiokBU

  Ashiok, Nightmare Muse bounces a permanent, enabling Ukkima, Stalking Shadow's recast / spell-cast trigger.