CASTING A SPELL AT A HIGHER LEVEL
When a spellcaster casts a spell using a slot that is of a
higher level than the spell, the spell assumes the higher
level for that casting. For instance, if Umara casts magic
missile using one of her 2nd-level slots, that magic
missile is 2nd level. Effectively, the spell expands to fill
the slot it is put into.
Some spells, such as magic missile and cure wounds,
have more powerful effects when cast at a higher level,
as detailed in a spell's description.
