Connection is interesting, but potentially dangerous, since its a lot more easy to repeatedly trigger than Prowess is. I'd hazard a guess that we'd want to balance bodies with -1/-1, -2/-0, or even -2/-1, what you'd normally get for that cost.

this is in the duel deck, I'll have playtest results in a few days

Playtest Feedback: Far less explosive than I predicted, however I'm not sure we need this as a mechanic in the set as the design space is a little narrow. I could see a build around uncommon with this or a similar ability.

Doesn't have the inherent tension like prowess due to it nearly always being an on-board effect.