Confidence:StrongSolidPlausibleTentativeSpeculative

• Helm of the Host

  4

  Legendary Artifact — EquipmentC

  Copy engine: one card makes copies of a creature — once a turn, or once for each time you pay its cost — and each copy pays off: the creature's enter-the-battlefield effect fires again, or the hasty copy uses its tap ability. Real, repeatable value — every copy has its turn or its price, so it never goes infinite on its own.
• Rionya, Fire Dancer

  3RR

  Legendary Creature — Human WizardR

  Copy engine: one card makes copies of a creature — once a turn, or once for each time you pay its cost — and each copy pays off: the creature's enter-the-battlefield effect fires again, or the hasty copy uses its tap ability. Real, repeatable value — every copy has its turn or its price, so it never goes infinite on its own.
• Innkeeper's Talent

  1G

  Enchantment — ClassG

  Counter synergy: both cards work with the same kind of counters, so their effects stack in a counters deck. Not necessarily a closed loop on its own.
• Deathcap Marionette

  1B

  Creature — FungusB

  Recursion engine: one card can reanimate repeatedly (an activated ability, or a return that comes back once a turn), and the other is a creature worth bringing back again and again. Real, repeatable value — not an infinite loop on its own.
• The Jolly Balloon Man

  1RW

  Legendary Creature — Human ClownRW

  Copy engine: one card makes copies of a creature — once a turn, or once for each time you pay its cost — and each copy pays off: the creature's enter-the-battlefield effect fires again, or the hasty copy uses its tap ability. Real, repeatable value — every copy has its turn or its price, so it never goes infinite on its own.
• Saheeli, the Sun's Brilliance

  UR

  Legendary Creature — Human ArtificerRU

  Copy engine: one card makes copies of a creature — once a turn, or once for each time you pay its cost — and each copy pays off: the creature's enter-the-battlefield effect fires again, or the hasty copy uses its tap ability. Real, repeatable value — every copy has its turn or its price, so it never goes infinite on its own.
• Molderhulk

  7BG

  Creature — Fungus ZombieBG

  Recursion engine: one card can reanimate repeatedly (an activated ability, or a return that comes back once a turn), and the other is a creature worth bringing back again and again. Real, repeatable value — not an infinite loop on its own.
• Tempestra, Dame of Games

  1R

  Legendary Creature — Elemental IllusionR

  Copy engine: one card makes copies of a creature — once a turn, or once for each time you pay its cost — and each copy pays off: the creature's enter-the-battlefield effect fires again, or the hasty copy uses its tap ability. Real, repeatable value — every copy has its turn or its price, so it never goes infinite on its own.
• Orthion, Hero of Lavabrink

  3R

  Legendary Creature — Human SoldierR

  Copy engine: one card makes copies of a creature — once a turn, or once for each time you pay its cost — and each copy pays off: the creature's enter-the-battlefield effect fires again, or the hasty copy uses its tap ability. Real, repeatable value — every copy has its turn or its price, so it never goes infinite on its own.
• Graveshifter

  3B

  Creature — ShapeshifterB

  Recursion engine: one card can reanimate repeatedly (an activated ability, or a return that comes back once a turn), and the other is a creature worth bringing back again and again. Real, repeatable value — not an infinite loop on its own.
• Splinter Twin

  2RR

  Enchantment — AuraR

  Copy engine: one card makes copies of a creature — once a turn, or once for each time you pay its cost — and each copy pays off: the creature's enter-the-battlefield effect fires again, or the hasty copy uses its tap ability. Real, repeatable value — every copy has its turn or its price, so it never goes infinite on its own.
• Omni-Changeling

  3UU

  Creature — ShapeshifterU

  One-shot copy enabler: a card enters as a copy of another (Phantasmal Image, Body Double, Phyrexian Metamorph), firing the partner's substantive ETB once. Not a repeating chain — fires once on entry — but valuable when the partner's ETB is combo-grade (graveyard reanimator, mana doubler, etc.).
• Jaxis, the Troublemaker

  3R

  Legendary Creature — Human WarriorR

  Copy engine: one card makes copies of a creature — once a turn, or once for each time you pay its cost — and each copy pays off: the creature's enter-the-battlefield effect fires again, or the hasty copy uses its tap ability. Real, repeatable value — every copy has its turn or its price, so it never goes infinite on its own.
• Moritte of the Frost

  2GUU

  Legendary Snow Creature — ShapeshifterGU

  One-shot copy enabler: a card enters as a copy of another (Phantasmal Image, Body Double, Phyrexian Metamorph), firing the partner's substantive ETB once. Not a repeating chain — fires once on entry — but valuable when the partner's ETB is combo-grade (graveyard reanimator, mana doubler, etc.).
• Season of Growth

  1G

  EnchantmentG

  Propagator Primordium returns creatures from the graveyard to the battlefield, re-firing Season of Growth's enter-the-battlefield effect.
• The Soul Stone

  1B

  Legendary Artifact — Infinity StoneB

  The Soul Stone returns creatures from the graveyard to the battlefield, re-firing Propagator Primordium's enter-the-battlefield effect.
• Sanguine Soothsayer

  1B

  Creature — Bat ClericB

  Propagator Primordium returns creatures from the graveyard to the battlefield, re-firing Sanguine Soothsayer's enter-the-battlefield effect.
• Sheoldred, Whispering One

  5BB

  Legendary Creature — Phyrexian PraetorB

  Sheoldred, Whispering One returns creatures from the graveyard to the battlefield, re-firing Propagator Primordium'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 Propagator Primordium's enter-the-battlefield effect.
• Tinybones Joins Up

  B

  Legendary EnchantmentB

  Propagator Primordium returns creatures from the graveyard to the battlefield, re-firing Tinybones Joins Up's enter-the-battlefield effect.
• Mutable Pupa

  G

  Creature — InsectG

  Propagator Primordium returns creatures from the graveyard to the battlefield, re-firing Mutable Pupa's enter-the-battlefield effect.
• Asmodeus the Archfiend

  4BB

  Legendary Creature — Devil GodB

  Asmodeus the Archfiend bounces a permanent, enabling Propagator Primordium's recast / spell-cast trigger.
• Emperor Apatzec Intli IV

  RGW

  Legendary Creature — Human NobleGRW

  Propagator Primordium returns creatures from the graveyard to the battlefield, re-firing Emperor Apatzec Intli IV's enter-the-battlefield effect.
• Starfall Invocation

  3WW

  SorceryW

  Starfall Invocation returns creatures from the graveyard to the battlefield, re-firing Propagator Primordium's enter-the-battlefield effect.
• Zero Point Ballad

  XB

  SorceryB

  Zero Point Ballad returns creatures from the graveyard to the battlefield, re-firing Propagator Primordium's enter-the-battlefield effect.