For just one black mana at instant speed, you search your library for any card, shuffle, and place it on top, setting up your next draw perfectly and losing just two life in the process
Sephiroth, Planets Heir Sephiroth, Planets Heir was officially revealed during the first look of the Final Fantasy crossover
The restriction on keeping Reclusive Wight is so stifling, theres no realistic way to both keep it alive and have any sort of gameplan that involves attacking or blocking
The full format guide explains the differences, where to find each type of event, and which to build for
As far as cards that can slot in in other builds, We Ride at Dawn is a great one for Convoke decks, especially because it helps re-cast a Commander but also provides bonus creature tokens to pile into the melee
And then theres Doctor Doom, a 3/3 black creature that enters with Doombot tokens, lets players draw a card and take damage at the end of their turn, and is indestructible while an artifact creature or Plan is on the field