Combat Senses

When you cast this spell, choose one willing creature within range. For the duration of the spell, this creature is attuned to the flow of combat and gains almost supernatural insight into tactics. For the duration of the spell, the creature can add your spellcasting ability modifier to their AC (minimum of +1), and gains Tremorsense and Blindsight out to 10 ft.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you may affect one additional creature for each level beyond 1st.