Special Summon-only monster

"Semi-Nomi" is a term that refers to a special sub-group of monsters. If a monster is a "Semi-Nomi Monster", then it means it must be Special Summoned by its listed effect before it can be Special Summoned by another effect. "Aqua Spirit", "Harpie Lady Sisters", and "Black Luster Soldier - Envoy of the Beginning" are all Semi-Nomi monsters. You can recognize a Semi-Nomi monster because it will have, "This card cannot be Normal Summoned or Set. This card can only be Special Summoned by..." in its text (although some cards, like "Black Luster Soldier - Envoy of the Beginning", do not have the first sentence, the "No Normal Summon or Set" rule still applies).

After a Semi-Nomi monster has been Special Summoned, it can be Special Summoned through other effects. This only lasts as long as the Semi-Nomi monster does not return to the Hand or Deck. As long as the Semi-Nomi monster remains on the field, in the Graveyard, or removed from play, you can Special Summon it again with other card effects.

As an example:

• A player removes from play three Fiends to Special Summon "Dark Necrofear". If it is destroyed and sent to the Graveyard, it can be revived (such as by "Monster Reborn").
• If, afterwards, it is removed from play by "Dark Core", you can still Special Summon it (such as by "Dimensional Inversion").
• If after all this, "Dark Necrofear" is returned to the deck or hand (such as by "Phoenix Wing Wind Blast" or "Compulsory Evacuation Device"), then you must use "Dark Necrofear"'s effect to summon itself again. You cannot Special Summon it from the hand or deck by other cards, such as "Monster Gate" or "Doom Shaman".
• If it is later removed from play or sent to the Graveyard (such as by "Graceful Charity"), it still cannot be Special Summoned.

Note that Fusion Monsters, Ritual Monsters, Synchro Monsters and /Assault Modes]] are treated as Semi-Nomis.

There is also a sub-type of monsters called "Nomi".

See also: List of Semi-Nomi Monsters.