Magical Musketeer Calamity

During either player's turn, you can activate "Magical Musket" Spell/Trap Cards from your hand. If a Spell/Trap Card is activated in this card's column: You can target 1 "Magical Musket" monster in your GY; Special Summon it in Defense Position. You can only use this effect of "Magical Musketeer Calamity" once per turn.