You cause the target to grow or shrink.

Your eyes become an inky void imbued with fell power.

You blast the target’s mind, attempting to crush its intellect and sense of self. The target takes 4d6 psychic damage. 

On a failed save, until the spell ends the creature’s Intelligence and Charisma scores are both reduced to 1. The creature can’t cast spells, activate magic items, understand language, or communicate in any intelligible way, but it is still able to recognize, follow, and even protect its allies.

The target becomes oven hot. Any creature touching the target takes 2d8 fire damage when the spell is cast. Until the spell ends, on subsequent turns you can use a bonus action to inflict the same damage.

The target is overwhelmed by the absurdity of the world and is crippled by paroxysms of laughter.

The target is

The target is

You utter the target's name and attempt to bind them for eternity. On a successful save, a target is immune to any future attempts by you to cast this spell on it. On a failed save, choose from one of the forms of bindings below (each lasts until the spell ends).

You infect your target with an arcane disease. At any time after you cast this spell, as long as you are on the same plane of existence as the target, you can use an action to deal 7d10 necrotic damage to the target. If this damage would reduce the target to 0 hit points, you can choose to leave it with 1 hit point. As part of dealing the damage, you may expend a 7th-level spell slot to sustain the disease. Otherwise, the spell ends. The spell ends when you die.

You conjure extensions of your own mental fortitude to keep your foes at bay.