Effect
Cannot be Normal Summoned, unless you control a "Ghostrick" monster. Once per turn: You can change this card to face-down Defense Position. Once per turn, during your Main Phase 1: You can target 1 "Ghostrick" monster you control; its ATK becomes equal to the combined original ATK of all "Ghostrick" monsters currently on the field, until the end of your opponent's next turn, but if it does, only that monster can attack this turn.
[Regarding "You can only Summon this card face-up if you control a 'Ghostrick' monster"]
This is not treated as an effect.
This is a condition for Summoning this card (placing it face-up in the Monster Zone via Normal Summon). You do not need to satisfy this condition when Setting this card via Normal Summon (placing it face-down Defense Position in the Monster Zone).
【Regarding the ① effect】
This is an Ignition Effect that can be activated in the Monster Zone.
【Regarding the ② effect】
This is an Ignition Effect that can be activated in the Monster Zone.
You cannot activate this effect if "Ghostrick Ghoul" is the only face-up "Ghostrick" monster present in either player's Monster Zone.
At resolution, check the combined original ATK of all face-up "Ghostrick" monsters in both players' Monster Zones. The effect "that monster's ATK becomes the combined original ATK of all 'Ghostrick' monsters on the field" is applied. If this resolution is successful, the state "monsters other than the targeted monster cannot attack this turn" is applied.
The effect "monsters other than the targeted monster cannot attack this turn" is an effect applied to your own monsters. Your monsters that are unaffected by monster effects can attack. (This also applies to monsters that are summoned to your Monster Zone after this effect resolves.)
Continue with related public research
From this rulings page you can jump back into card data, set archives, tournament decks, banlist checks, and market movers.
Card database
Search Yu-Gi-Oh! cards, archetypes, stats, and printings.
Set archive
Navigate booster sets and inspect all cards in each release.
Tournament decks
Browse competitive decklists, player finishes, and archetype trends.
Banlist status
Check the current status of Yu-Gi-Oh! cards on the banlist.
Market movers
Track the top Yu-Gi-Oh! price gainers and momentum cards.