Ultimatum

You bind a creature to action, its fate resting on its choice. Choose a creature you see in range when you finish casting this spell. Then choose a spell that you can cast that is 5th or lower, has a casting time of 1 bonus/action, affects at least 1 creature, and doesn't require an attack roll.

You cast that spell, called here the bound spell, as part of casting this spell, expending slots for both, but the bound spell doesn't come into effect. Instead, it takes effect, targeting the creature upon which Ultinamtum is cast when you cast the 2 spells. For example, an Ultimatum is cast with Confusion might stipulate that Confusion comes into effect if the target ever speaks of a certain subject.

The bound spell takes effect instantly after the circumstance is met for the first time, whether or not you want it to, and then this spell ends. The target makes its save against the spell when the circumstance occurs. 

The bound spell takes effect only on the target of this spell, even if it could normally target more than 1 creature. You can only have 1 bound spell active at a time. If you cast this spell again, the effect of any other Ultimatum spell you have cast ends on its target. A Remove Cursewill also end the effect on the target.

At Higher Levels. When you cast this spell using a slot of 7th or higher, the bound spell can be 1 level greater than 6th.