With enough mana you can poison someone for 4, and even protect it via regenerate
Remember how good enchantment removal was in Kamigawa
Courser of Kruphix, Heros Downfall, and Languish have forced the older versions of the deck down a path to only need white double white for Elspeth, Suns Champion too far down the line for a dedicated manabase
Its mainly a black deck, but the dual lands allow you to max out on converge
The Commander Breya, Etherium Shaper is a powerful tool to have on the battlefield
Players other than you and the chosen player may still perform game actions besides casting spells and attacking with creatures: They may block with creatures, activate abilities, perform special actions, and so on