By default, Candy Grapple can take out most enemy threats in the early to midgame, and is costed accordingly
Your opponent will want to take him out quickly, but with a Willpower of four, the odds are fairly good that youll be drawing at least one card
Summary Ugin's Labyrinth is a strong land card for accelerating spells and maintaining consistency in your deck - a valuable addition
You get 1 roll a turn for free, and additional rolls cost 1 for each previous roll
BPhillipYork: Solid midrange Eldrazi, also good commander if you're committing to colorless colorless instead of cool things like 5c colorless (aka Morophon, the Boundless)
With Blues access to incredible draw cards, you might just be able to draw and play as much of your deck as you like