Door of beasts

A door of beasts was a dweomered door that, when disturbed, would burst open and spew forth monsters and beasts per the spell summon monster IV.

These doors were always made with elaborate knobs and knockers in the shape of the head of a beast with gems for eyes. Before they were activated they were found shut and locked until someone tampered with them.

Creation
Door of beasts were created with use of the summon monster IV spell.