Salt.

Tobias was a genius. Salt was definitely a possible ingredient for potions, and when he dumped his Herbology gear back in his dormitory after grabbing the ginger root, he'd checked his potions book. Yup. Right there. Salt.

And he was right near the kitchens as well. Perfect.

Going by information he'd learnt from eavesdropping on overhearing some other students, the kitchens were very close to the Hufflepuff common room. Tobias wished there was some decent food so he could follow the smell, but in reality he was pretty confident he would find the place.

And here he was.

Quite sure that he was running out of time, but not owning a watch and therefore being unable to check, Tobias resolved to move quickly. After this, he still had one more ingredient to find.

He eyed a saltshaker not too far away on a counter and considered taking the entire thing... but then figured that if he was caught he'd probably get into a ton of trouble, seeing as the castle seemed to be grasping at every last knut. So Tobias drew from his pocket a tiny vial that he'd stolen borrowed found just lying about in the common room, and poured a decent amount of salt into it before stoppering it up.

And then he turned on his heel and hurried out, counting on his hyperactive nature to fuel all this rushing around and not allow him to run out of steam.