Gishki Vanity (HA05-EN032) - Hidden Arsenal 5: Steelswarm Invasion 1st Edition

During your Main Phase: You can discard this card; this turn, your opponent cannot activate Spells, Traps, Spell/Trap effects, or Monster Card effects when a "Gishki" monster is Ritual Summon, or when a "Gishki" Ritual Spell is activated.