Mind Stone
This deck is a crowd-pleaser at casual pods of any experience level and makes a fantastic gift for any MTG player
To get our heavy-hitters in the graveyard we've got Unmarked Grave, Vile Entomber, Final Parting, and Oriq Loremage to tutor them into our graveyard, or discard them from hand while killing something with Armix, Filigree Thrasher
Liliana's Caress is an obvious one here, and when combo'd with Blightning or any of the other discard spells it's just brutal, often doing enough damage to lead to an opponent's demise at their upkeep (with a little help from The Rack, Shrieking Affliction, or Quest for the Nihil Stone)
For three mana, Neheb is a Black and Red 2/2 with first strike that also gives all of your other Minotaurs first strike
The early plan with this deck is to sit and be patient