Quoted from CrazyLevi:Re: Mind gem-
But does the mind gem kill any shot on the playfield? Or just the one that the gem sits on?
If binary is on center ramp, but mind gem is on the drops, is there any point in using it?
So depending on the level of avenger. Collected, you can action button the shot the gem it's at if it's blinking for an objective. Level 1 you get 3 action button uses for any lit shot on the field. And max level is only one button use, but collects all active lit shots. So depending on which quest/mode you're in, you want it in one or the other. Like the most common use is lvl1 on soul gem. Use it on the three more difficult ones (except the last tower one). If you have it max level there, it's a waste.