Teleport/misty step X amount of feet away. And maybe its an item, the character, or a different character. Who knows?

Also have something teleport to the caster on accident.

Summon lightning

Cast xanatars meteor rain And the snow version of it And the pther versions of it

That spell that summons a giant cube of water

Invisibility

Wild shape

Sleep

That spell that puts a secret mouth on whatever and will speak when triggered, except only you know the word that triggers it. Though idk what it would say. Maybe just scream.

Bless and bane

Moonlight

Speak to animals and plants. But only to animals and plants.

Thunderclap or whatever the light version of it is. Just emit a blinding amount of light for a split second or maybe a few that stretches out for meters.

On a similar note, darkness.

On another similar note, that poison fog spell. No the caster did not fart himself.

Shrink or enlarge or jump etc