So far I haven't seen this card being hyped for EDH as much as I would suspect, but Treacherous Blessing is a great card draw spell
Chapter III in particular makes attacking feed you cards, so sometimes Shiva plays out like two turns of Moat. You can also try to combine this with other stun effects to draw extra cards, though there arent many of those (mostly just Ice Flan and Omega, Heartless Evolution)
Standard and, to a slightly lesser degree, Pioneer are much friendlier formats to decks built from mostly a single set, and the new player is both more likely to see other players playing cards of "their" set and to see other cards and mechanics that could augment their strategy
12 Malakir Bloodwitch Though many Vampire-Tribal decks rely heavily on the aggressive use of combat to defeat their opponents in Commander, Malakir Bloodwitch is a creature that can be used to close out a game when paired with an established board state
Maskwood Nexus is the stand-out here, giving every creature you control every creature type, giving you a full party every time you have four or more creatures on the battlefield
The Hospital Room side feels a bit inefficient in comparison