what card stock is mtg cards 310gsm Black Core TCG Cardstock - DIY Proxy - Blank Smooth Blackcore Playing - 8.5 * 11in Sheets Secrets of Strixhaven Mystical Archive:

Ria Ivor, Bane of Bladehold Ria Ivor was an Auriok, one of the first Mirran inhabitants to encounter the Phyrexians

The Five Best Mono-Black Commanders Krrik, Son of Yawgmoth No commander captures blacks power at any cost philosophy better than Krrik, Son of Yawgmoth

Commander's Sphere is also widely popular for similar reasons: You ramp and fix mana with this rock, and draw a card when needed (for 0 mana, even if tapped out!)

Other cards are legal where already available in other formats

Sphere of Annihilation has already been put in one row with such monumental removal artifacts like Ratchet Bomb and Oblivion Stone, and rightfully so