Torment , where Cabal Ritual originally appeared, was heavily weighted toward black and contained a lot of graveyard-related abilities, making the card a perfect intersection of story and gameplay
Considering Dragons have some very powerful, high mana value creatures with powerful abilities and some of the best tribal synergies, this is a powerhouse of an enchantment
Amber (healing and protection), Amethyst (magic and card draw), Emerald (disruption and tempo), Ruby (aggression and high power), Sapphire (ramp and value), and Steel (removal and big bodies)
This sales cycle behavior is fairly typical for new TCGs
Enter Deadly Insect
Big answers like Rune-Scarred Demon and Woodfall Primus