Drana and Linvala will affect some opponents more than others, but it'll be fun to see what activated abilities you can pick up along the way
My logic for including both is simply that they are both so strong, noth as cards and within this archetype, they should comfortably win almost all games in which they are not dealt with reasonably promptly making a potential dead card in hand far less of an issue
You may want to consider Reliquary Tower if you build something similar, you'll always have a full hand or more
Whenever a creature is blocked it remains blocked regardless of what happens to the blocking creature unless an ability says otherwise
If you want to build around Egon in mono-black, then there are more than enough payoffs, too
Battle Angels of Tyr Myriad is one of those abilities that always felt like a cool mechanic that was just not put onto interesting cards, but it really feels like they finally got it right this time around