Invisibility

Source: Player's Handbook

Level 2 Illusion (Artificer, Bard, Sorcerer, Warlock, Wizard)

Casting Time: Action
Range: Touch
Components: V, S, M (an eyelash in gum arabic)
Duration: Concentration, up to 1 hour

A creature you touch has the Invisible condition until the spell ends. The spell ends early immediately after the target makes an attack roll, deals damage, or casts a spell.

Using a Higher-Level Spell Slot. You can target one additional creature for each spell slot level above 2.