This is something you can definitely consider when looking at building an ally focused deck
Dark Ritual was the first mana-generating spell of its kind, and the reason why we call these spells rituals. Its emblematic of blacks ability to exchange one resource for another, in this case trading a card for a burst of mana
BitterblossomBitterblossom it is not, but I'm sure this fun card will find a room in Piru, the VolatilePiru, the Volatile, Felisa, Fang of SilverquillFelisa, Fang of Silverquill, and Thalisse, Reverent MediumThalisse, Reverent Medium, to name a few
You can do so much with Witherbloom, the Balancer outside Sprout Swarm combos, and its going to be fairly cheap to cast in a dedicated go-wide deck, despite the high mana value
Once you progress to scenario two, you have a comprehensive glossary of rules to refer to when the need arises
Some people love these errors and could net you more value in some cases