While black does have ways to draw cards besides conventional card draw spells, it often relies on paying life or having creatures pass in and out of the graveyard
That tends to happen with cards that players have no recourse to play against or around
You should be able to define the goal or theme your deck is built around, and ideally it should be something youre really excited about
Despite being an evergreen mechanic, you wont find decks based entirely on counterspells
Now Im not going to keep repeating how +1/+1 counter synergies are everywhere, but what I really like otherwise about the abilities here is that you can trigger them on any turn once, so if you have an engine for life gain going and triggering on every turn with say Properous Innkeeper and Beledros Witherbloom (also in the deck), youll be sitting pretty on you next turn with possibly four 7/7 racoons
It really shows the power of a group to oversee vital game elements