Ritual of Black Mastery [SS04-ENS01] Common

Activate this Skill during your Main Phase, while you control "Black Luster Soldier" or "Magician of Black Chaos" that you Ritual Summoned this turn.
• While you control "Black Luster Soldier", it cannot be destroyed by your opponent's Skill, also once per turn, if your opponent activates a Trap Card, draw 1 card immediately after it resolves.
• While you control "Magician of Black Chaos", it cannot be destroyed by your opponent's Spell effects, also if your "Magician of Black Chaos" destroys a monster by battle, add 1 Spell from your GY to your hand.