Its main strategy revolves around casting multiple spells to trigger prowess, generating card advantage, and summoning dragons to dominate the board
Theres the obvious benefit that youre getting some free creatures to swing with for one turn, but Mirror March lets you cash in on multiple effects that trigger when that creature enters the battlefield
Bolass Citadel can enable some broken stuff in any mono-black deck, especially one focused around artifacts
Eris also has flying and prowess, but the most important thing is: Once it's on the battlefield, whenever you cast your second spell each turn, it creates a 4/4 red Dragon Elemental token with flying and prowess
Spirit Token (Kykar) White Flying 1/1 Size 8.8cm x 6.3cm, Fit perfectly into KMC perfect fit sleeve
Mox Pearl was fourth because of Balance and sometimes Swords to Plowshares, leaving the Mox Emerald for last