Whereas Draft consists of three booster packs, a cube is a set of cards (usually 180, 360, or 450, but sometimes less) that is shuffled and split into 15 card packs to be drafted
If two or more effects attempt to modify how many counters would be put on a permanent you control, you choose the order to apply those effects, no matter who controls the sources of those effects
Kit Cloudkicker Spunky Bear Cub & Navigator Sapphire Kit Cloudkicker seems pretty strong, possessing Ward even as a one-cost character and then questing for three lore for only a Shift 3
Cracking the Combination You have access to some really fun combos with this pile of cards
Booster packs are meant to build the core of your deck, not the finer parts
Certainly, Dimir cards offer plenty of evasion for this version of Vensor to deliver the first poison counter, then cheap creatures like Plague Myr, Myr Convert, and Voidwing Hybrid follow up on the poison and drive it home