Effect
Cannot be Special Summoned. When this card is Normal Summoned: Change this card to Defense Position. If you control a face-up Xyz Monster that has Xyz Material: You can banish this card from your Graveyard, then target 1 monster your opponent controls; it loses 500 ATK for each Xyz Material attached to a monster you control.
"Cannot be Special Summoned" is not treated as a monster effect.
"When this card is Normal Summoned: Change it to Defense Position" is a Trigger Effect.
"The targeted monster loses 500 ATK for each Xyz Material on your field" is an Ignition Effect that activates in the Graveyard. (It targets 1 face-up monster your opponent controls.)
When activating the effect "The targeted monster loses 500 ATK for each Xyz Material on your field," banish this card from your Graveyard as a cost.
As long as a monster affected by the effect of "Overlay Sniper" remains face-up on the field, the ATK reduction continues to be applied.
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.