Ancient Gear Knight (BP03-EN033) - Battle Pack 3: Monster League 1st Edition

This card is treated as a Normal Monster while face-up on the field or in the Graveyard. While this card is face-up on the field, you can Normal Summon it to have it become an Effect Monster with this effect. // * If this card attacks, your opponent cannot activate Spell/Trap Cards until the end of the Damage Step.