A spell is a discrete magic effect, that a single shaping of magical energies that suffuse the multiverse into a limited expression. A spell is a versatile tool, that deals with damage or drains life energy away and restores a dead to life.
There are thousands of spells that have created throughout multiverse history, and many of them forgot. Some might be recorded in crumbling spellbooks or trapped in the minds of dead gods. You can get the updated wizard spells 5th edition list and reinvent them by a character who has amassed enough power and wisdom to do so.
Casting a Spell -Higher Level
Casting a spell using a slot that is of a higher level than the spell. It assumes the higher level for that casting. For example, if umara casts the magic missile using one of her 3rd level slots, that spell expands to fill the slot it put into. Spells like magic missile and cure wounds have more effects when they cast at a higher level.
One can cast limited number of spells before resting, regardless of how many spells he or she knows. Manipulating the magic and channeling its energy into a simple spell is physically and mentally taxing, and even higher-level spells too.
You can also think that a spell slot as a groove of a specific size like small for 1st level slot, and large for the higher-level slot. A 1st level spell fits in any size slot, whereas a 9th level spell only fits on the 9th level slot.
Some of the characters have few special abilities that let them to cast spells without using a spell slot. For example, a monk who followed the way of four elements, a warlock, and a fiend from the hells, can cast spells in such a way.
Combining the Magic
The effects of combining different spells, add together while the durations of those spells overlaps. The effect of the same spell cast multiple times and it doesn’t combine.
For instance, if two of the cleric’s cast bless on the same target, the character gains the spell’s benefit once and he or she doesn’t get to roll two bonus dice.