Create Residuum

Choose one creature, object, or magical effect within range. Any ongoing spell of level 3 or lower on the target ends. In addition you gain a small amount of magical Residuum dust equal to a quarter the value of a magical item or 10gp/level of spells converted.
For each ongoing spell of level 4 or higher on the target, make an ability check using your spellcasting ability (DC 10 plus that spell’s level). On a successful check, the spell ends. And you gain some Residuum.

Using a Higher-Level Spell Slot. You automatically end a spell on the target if the spell’s level is equal to or less than the level of the spell slot you use.

Residuum can be used as a generic spell component and replace anything that is consumed on use.

Warning: Residuum can be a highly addictive drug to arcane spell casters.