A barrier that glimmers with an oily rainbow hue pops into existence around you. The barrier moves with you and prevents creatures other than undead and constructs from passing or reaching through its surface. 

You instantly know the answer to any mathematical equation that you speak aloud. The equation must be a problem that a creature with Intelligence 20 could solve using nonmagical tools with 1 hour of calculation. Additionally, you gain an expertise die on Engineering checks made during the duration of the spell.

Note: Using the calculate cantrip allows a player to make use of a calculator at the table in order to rapidly answer mathematical equations.

This spell reveals whether there is at least one trap within range and within line of sight. You don’t learn the number, location, or kind of traps detected. For the purpose of this spell, a trap is a hidden mechanical device or magical effect which is designed to harm you or put you in danger, such as a pit trap, symbol spell, or alarm bell on a door, but not a natural hazard.