Solution to the puzzle Parallel Dimensions

Parallel Dimensions is one of the interesting puzzles of the Melbourne University Puzzle Hunt 2014 competition. The game's plot that year was based on the manga (or anime) Fullmetal Alchemist. The puzzle was preceded by a short narrative that moved the script forward. You hurriedly break down the doors only to step on a rune trap, plunging you into a white purgatory. Looking around, you spy a little floating black ball. Its single eye opens, and a wide grin appears. “Oooooh we haven't had company here in a while.” “What is this place?” “Who knows...?” Silence. “Surely there's a way out!” “Perhaps there is...” More silence. This isn't going anywhere. You sprint off in a direction, quickly realising your efforts are futile. The black ball re-materialises. “Silly human, you're not going anywhere.” Perhaps a bit of alchemy would help. No dice. You feel a warm rumbling from your pockets. You pull out the crystals collected thus far, and they began to radiate with a...