Skywrite

From Xanathar's Guide to Everything, page 165; and Elemental Evil Player's Companion, page 22.

Description
2nd-level transmutation (ritual)


 * Casting Time: 1 action
 * Range: Sight
 * Components: V, S
 * Duration: Concentration, up to 1 hour

You cause up to ten words to form in a part of the sky you can see. The words appear to be made of cloud and remain in place for the spell's duration. The words dissipate when the spell ends. A strong wind can disperse the clouds and end the spell early.

Learned By

 * Classes: Artificer, Bard, Druid, Wizard
 * Subclasses: Fighter (Eldritch Knight), Rogue (Arcane Trickster)