I started working with a couple of ideas, and they quickly morphed into force blocking, deathtouch, indestructible, and regeneration, with a little trample thrown in. That sounds like a lot of disparate concepts to pull together into a unified and coherent deck, but in reality, there are a number of ways to go by bringing pieces together on both the creature and non-creature sides, each having or giving one or more of the keywords. It has the potential for great speed, but it can also hang. The deck is a little light (for me) on creatures, at 22, but they are cheap and can live a long time with regeneration and indestructible. Non-creature spells are more expensive, at an average 2.00, but all contribute well. The 18/13/9 curve still comes in at only 1.78, and very few spells have double black or double green. The name is a play on the (literal and figurative) black thumb and green thumb idea.