This Esper enchantment creature is an incredibly potent package, representing an infinite mana outlet, the ability to serve as a static Underworld Breach for enchantments while in play, and best of all can be built a half dozen different ways, meaning that youre never quite sure what kind of deck youre facing down at your cEDH tables
You can set up these triggers however you like, so if you want to have a few token Merfolk you have lying around try and power through your lands you can, while giving Hakbal and your other creatures the +1/+1 counter when you explore a nonland card
Rather than just having one or two vehicles in the deck, there are 15, meaning you can really focus on how to deploy these artifacts to make the most of them
Less than 40 of these cards are known to exist
Five mana to cast a random card is better than 5 mana spent doing nothing, and the strategy needs every bit of ramp it can get
This means there is approximately 1 rainbow rare for every two boxes