Black/Red distinguishes itself from its Blue/Red cousin by ditching the four mana incentive in favor of just flinging cheap noncreature spells left and right
This is a five-mana white enchantment that reads: If one or more creature tokens would be created under your control, that many 4/4 white Angel creature tokens with Flying and Vigilance are created instead. Basically, if you were going to make a 1/1 Goblin token, for example, you would instead make a 4/4 angel with Flying and Vigilance
A store also adds practical tools: store categories built around your inventory, like Commander staples, lands, foils, sealed product, and bulk lots, plus bulk listing and a branded storefront that makes a serious card seller look the part
Formats like Modern and Pioneer usually require you to deal with lots of different permanents, and the flexibility of Skyclave is king in those cases
The issue is that you can't draft those kinds of deck as no sensibly balanced drafting cube will contain enough of the weak enchantment support cards you need
I support you