Ink
Colourful and staining (believe me, hella hard to get our of clothes and fingers) liquid that comes out of tips of pens; not to be consumed under any circumstances as death and poisoning will most surely follow.
Harry: Hey, Ron, can you pass me that ink pot? Ron: No, I can't. Harry: (blasts Ron into oblivion) (Remember to always share because you never know who you might save).
By AMBG88