I toyed with the idea of white for Stoneforge Mystic (as Cranial Plating is the best card in the deck) and Lost Leonin however despite the fantastic ratio of infected power to casting cost the vulnerability, lack of evasion and lack of being an artifact makes the Leonin worse than all of the other two drop infectors
Uncommon cards are slightly harder to find than common cards and have a diamond shape in the bottom right corner
You can use Ice to neutralize an attacker or clear a blocker on your opponents end step, or even tap a Trinisphere to turn it off
So thats what we use our suite of destructive, trade-focused black cards to help set up and cash in on with the usual suspects like Siege Zombie and Morbid Opportunist
When a new event drops, check the mission rewards for bonus booster packs, and work toward completing the mission
Or, if that's not what you want to do, then by all means enjoy the individual cards value, because those are good also