Its potential damage output (up to 130 with Blaine) makes it a formidable choice for beginners
Fast mana and cost reducers like Lotus Petal and Rite of Flame help you cast Casey early and quickly work through the three cards he draws before your next upkeep
If you play a land or cast a spell from a graveyard using another permission, it won't stop you from using Coram's permission to do the same thing later in the turn, provided you haven't already done so
Given that the title is Ghostbusters: Slimer, it also feels as though Wizards is setting up more Ghostbusters-themed Secret Lairs for the near future
I'm cutting one of each Land , Swamp and Forest
Either way, what we have is either a product as it was initially designed before being split into two for some reason, or one that wasn't meant to be smashed together and isn't going to be all that fun to play with