Baleful Mastery [Strixhaven: School of Mages Prerelease Promos] Human Citizen Set: Kamigawa: Neon Dynasty Promos

Set: Kamigawa: Neon Dynasty Promos Type: Artifact Rarity: Rare Cost: {3} The "legend rule" doesn't apply to permanents you control

Then C=v(a²+b²)

where X is the total of those results

Set: Double Masters 2022 Type: Artifact Rarity: Mythic Cost: {1} Mana Vault doesn't untap during your untap step

Baleful Mastery [Strixhaven: School of Mages Prerelease Promos] Human Citizen Set: Kamigawa: Neon Dynasty PromosSet: Strixhaven: School of Mages Prerelease Promos Type: Instant Rarity: Rare Cost: {3}{B} You may pay {1}{B} rather than pay this spell's mana cost. If the {1}{B} cost was paid, an opponent draws a card. Exile target creature or planeswalker.