The bundles are solid, as if wrapped in spiderweb. As you stand contemplating
this Derrat suddenly feels a wrenching pain as a chain lashes seemingly from nowhere into his side and wraps around him. (17 damage) An unholy din of screeching metal fills the air. As you look to see the source, you see an immense spider seemingly made of chains hanging from the wall. ((Not that it's immediately relevant but what did you guys do with the box?))
Roll initiative, fort saves and could Derrat please roll a grapple check.