In 5E you can cast low level spells in a high level spell slot.
I think the whole point of the slot system is to prevent players from using their mana only for the most powerful spells.
You have only 1 lv9 spell per day, but then you can still cast lots of low level spells.
Prof. Dr. Dr. Mad S. Tist
World leading expert of artificial stupidity.
Because there are too many people who work on artificial intelligence already
