If you really enjoy unique typal strategies, this Cats deck is a reasonable option at the FNM level.
The issue is that there is not enough of the generally playable one mana options for one person, let alone two people in the colour, not that there are not enough total to have black fully covered for its potential needs in the discard department
The primary Commander, Zhulodok, Void Gorger, benefits from casting these enormous colorless spells
They are easy to understand, provide balanced play options, and allow learning core mechanics such as DON
Green Sun's Zenith and blue Counterspells are the engine in this midrange powerhouse
Cards that let your creatures deal damage based on their toughness dont affect their power, so all your 0/4s and 0/6s deal tons of combat damage while triggering Rigo