Tremorsense

You touch a willing creature, enhancing its ability to perceive vibrations. For the duration, that creature has tremorsense out to a range of 30 feet. This allows the creature to perceive creatures and moving objects, provided that the creature or object is in contact with the same ground or substance. This sense works through walls and around corners as long as the other limitations are fulfilled. Creatures that are hiding are not automatically found, but they have disadvantage on their stealth check against the affected creature if they move while within the radius of the sense.

Using a Higher-Level Spell Slot. The number of targets increases by 1 for each spell slot level above 2.