The reasons are two-fold: Blue gives access to Blighted Agent and some of the best spells in the game, like Ancestral Recall and Time Walk
If I have a bunch of 3-drops I want to play, I want my ramp to hit before that, so I want two-mana ramp (and probably Sol Ring)
Leonardo, the Balance Leonardo, the Balance is a mini Cathars' Crusade that looks to trigger on any token you create, that includes creatures on your turn, treasure on Tim's turn, food on Mel's turn and so on
Lady Octopus, Inspired Invader Lady Octopus offers an interesting tool for Mishras Bauble decks in older formats
This has a ritual-like ability to turn your creatures into mana in a goblin deck
- 1 Collectors box to hold everything, with 6 dividers to keep it organized