Poison Spray

0-level (Cantrip) Conjuration

You extend your hand toward a creature you can see within range and project a puff of noxious gas from your palm. The creature must succeed on a Constitution saving throw or take 1d12 poison damage.
At higher levels: This spell's damage increases by 1d12 when you reach 5th level 2d12 , 11th level 3d12 , and 17th level 4d12 .

Prestidigitation

0-level (Cantrip) Abjuration

This spell is a minor magical trick that novice spellcasters use for practice. You create one of the following magical Effects within range.   • You create an Instantaneous, harmless sensory effect, such as a shower of sparks, a puff of wind, faint musical notes, or an odd odor.   • You instantaneously light or snuff out a Candle, a torch, or a small campfire.   • You instantaneously clean or soil an object no larger than 1 cubic foot.   • You chill, warm, or flavor up to 1 cubic foot of nonliving material for 1 hour.   • You make a color, a small mark, or a Symbol appear on an object or a surface for 1 hour.   • You create a nonmagical trinket or an illusory image that can fit in your hand and that lasts until the end of your next turn.   If you cast this spell multiple times, you can have up to three of its non-instantaneous Effects active at a time, and you can dismiss such an effect as an action.

PHB, page 224

Comprehend Languages

1-level Divination (ritual)

For the duration, you understand the literal meaning of any spoken language that you hear. You also understand any written language that you see, but you must be touching the surface on which the words are written. It takes about 1 minute to read one page of text.   This spell doesn't decode secret messages in a text or a glyph, such as an arcane sigil, that isn't part of a written language.

PHB, page 252

Illusory Script

1-level Illusion (ritual)

You write on parchment, paper, or some other suitable writing material and imbue it with a potent illusion that lasts for the duration.

  To you and any creatures you designate when you cast the spell, the writing appears normal, written in your hand, and conveys whatever meaning you intended when you wrote the text. To all others, the writing appears as if it were written in an unknown or magical script that is unintelligible. Alternatively, you can cause the writing to appear to be an entirely different message, written in a different hand and language, though the language must be one you know.

  Should the spell be dispelled, the original script and the illusion both disappear.

  A creature with truesight can read the hidden message.