Ancient Gear Gadget

Level 4 EARTH/Machine Effect Monster
500 ATK / 2000 DEF

If this card is Normal or Special Summoned: You can declare 1 card type (Monster, Spell, or Trap); this turn, if a monster you control attacks, your opponent's Spell Cards, Trap Cards, or monster effects (whichever was declared) cannot be activated until the end of the Damage Step. Once per turn: You can declare 1 "Gadget" monster's card name; until the End Phase, this card's name becomes that name.

Rulings – Yugipedia

Printings:

Machine Reactor Structure Deck: SR03-EN000 (Ultra Rare) - 2017-04-13
Legendary Duelists: Season 1: LDS1-EN081 (Common) - 2020-07-02
Speed Duel GX: Duel Academy Box: SGX1-END11 (Common) - 2022-03-17

Prices:

Cardmarket: 0.14 €
TCGplayer: $ 0.15