Talk:Barrier/@comment-26577623-20160417213007/@comment-27620479-20160427191830

My guess would be:

Either they just created the strongest barrier they could without thinking about whether or not a human can cross it,

or anything less wouldn't even do. The combined soul power of monsters is more than that of a human. It can also be used as a substitution, because Asriel doesn't need a seventh human soul to break the barrier.