It is a box of SPECIAL STARDUST. Cherubs love this stuff. They eat it like breakfast cereal every day.
It doesn't even have any magical properties though. It's really just some useless sparkly powder they like to eat. It's basically inedible to any other kind of creature. However, it is potentially quite useful for various arts and crafts.
Hey check it out. Every week we'll be revealing some new troll characters from Hiveswap until Act 2 is out. Follow the Troll Call here, and meet the first two here. Expect a few more surprises like this to drop in coming weeks.