Arcane Infusion

You learn an ancient technique to infuse your weapon with a spell for a temporary amount of time. As an action, you can imbue a spell of 1st level or higher, to a maximum of ninth level, into any weapon that you are holding.  You cast the spell as normal, but the spell effect does not occur until after the weapon is used in an attack that hits. The weapon holds the spell effect until the end of your next long rest or until it is used in an attack. If you cast a spell that affects one creature, the next time the imbued weapon hits a creature with an attack, the attack deals damage as normal, and then you resolve the spell's effect against the target. If the imbued spell has an area, the creature does not need to be hit for the spell to take effect. Instead you resolve the spell's effect from the space or creature you targeted. If the weapon hits a creature, damage is dealt as normal. Once you resolve the spell's effect, the spell vanishes from the weapon. If you have more than one spell infused, they must all be resolved at the same time.