Basim Ibn Ishaq is a Dimir (blue/black) commander that has useful effects that encourage the usage of historic spells to get the most out of his abilities
It also counters a spell, but instead of hurting your opponent, it gains its caster three life
Six mana may be a lot, but artifact decks often have ways to create a lot of it pretty easily
Zanarkand, Ancient Metropolis is the green land in this cycle
For seven mana, Sire of Seven Deaths elegantly has seven keywords, is a 7/7, and the Ward cost is a whopping seven life
Coveted Jewel There are more busted cards I can copy with Mishra, Eminent One, but if I do that once with Coveted Jewel, I draw six cards for neutral mana in a deck that usually has a Slobad, Iron Goblin effect lurking around