Lightning Bolt was especially important at PT 1, as it was the best clean answer to Black Knight, Order of the Ebon Hand, White Knight, Order of Leitbur, and so on (since both Swords to Plowshares and Terror had giant weaknesses)
Note that there is no "nontoken" word here, so instant speed artifact tokens will trigger too as well as lands that make them like Mirrex
Regardless, this incarnation of the Witch-King is still a reasonable army-in-a-can sort of threat for spell-focused decks
Some players will use Wheel of Misfortune for reasons other than card advantage
Thanks to delve, it often comes down much cheaper than its 7-mana tag, and it grows fast with every instant and sorcery you exile or play
Regardless of which commader you play, the unearth cards and graveyard recursion makes the deck incredibly resielnt and hard to keep down