Althor's Force Sense

Casting Restrictions: All of Althor's 1st level spells require at least a 15 INT to learn and cast. All of them are cast as a 1 minute ritual which embeds a spell pattern into the creature or item to be affected or who will be triggering the spell. Once the ritual has been cast the spell can be triggered  as either a reaction or an opportunity action by EITHER a quick 1 hand gesture OR a single keyword as a reaction. If cast as a full ritual (11 minutes cast time) the spell counts as a standard ritual spell. If the shorter ritual is used, then a spell slot is used up.

Spell: Althor's Force Sense

When triggered, the piece of metal sticks to either the forehead of the user or their helm or hat if they are wearing such and grants them Althor's Force Sense as an additional sense.

Invisible pulses of force are sent out in a 120' long cone allowing the caster to "see" the forms of any creatures or objects in it. This is not based on sound or light and so isn't affected by silence spells, being deafened or blinded and the like. It only allows the caster to see forms with their hardness or softness being represented as a series of new "colors" to the user. Things made of the same material you are in, whether air or water, and non-solid illusions would be invisible to this sense. 

Note that many "invisible" creatures would be "visible" to this sense, however, you couldn't tell the difference between a stature and a person until the person moved and the front of a gelatinous cube, for example, would be seen as a soft "wall". The nature of most illusions, at least those within range of a person's normal senses, would be obvious to the user.