That one was a remarquably close call: on the second floor, a rare room Elite spawn killed me, and I was miraculously saved by a 10% potion I had lying in my inventory (I think it gave bonus points at the end of the run by the way, if @robc04 is still looking for that sort of info). With 6 hit points left, I was about to meet my doom by entering another Elite room, but I had a small stop at the trader before… and the coveted Mind Blast happened.
Talk about a turn of events.