Top down common design I had on hand since I am digging into UB designs.

Is this too efficient for a common 2/2 color pie wise?

Like is the activated ability better than Culling Drone or Kolaghan Skirmisher? which are probably the most pushed black bears we have had.

I think its borderline and could be convinced either way.

I think black is getting increasingly good bears (though not on the level of green and white), and Slaughter Drone is pretty good indication that this would be fine. On a 2/2, I wouldn't be very concerned with making the cost .

I forgot about Slaughter Drone, ok this is probably fine.

The clincher for me is that giving a vanilla the ability to gain hexproof is not necessarily a huge bonus.

I think we actually want a whole cycle of cards like this. We have a lot of mechanic cards, but not a lot of other commons that are quite this simple.

Cross-linking the rest of the cycle: Wasteland Brawler, Escaped Baloth, Trite Citizen, Patient Observer.

Agreed CasualR, but cycles like this are usually most solidly figured out in development. Still, why not start early?

Should we have one for each color pair, or just allies?

True, Not sure. Either way works. Probably one for each pair. Depends on how many commons we actually need/want