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Upcasting
Upcasting is when a spellcaster chooses to use a higher level spell slot to cast a lower level spell. Many spells gain additional damage dice, a larger area of effect, allow for more targets or are otherwise improved when upcast, but some spells gain no additional benefit other than the fact they are treated as a higher level spell.
Because the 
's Pact Magic feature only grants spell slots of their highest known spell level, their lower level spells are always upcast to that level. (The only exception is if they use a lower-level spell slot gained from another source.)
Cantrips do not use spell slots, but damaging cantrips grow more powerful as a character gains levels. Upon reaching Character Levels 5 and 10, an additional damage die is automatically added (or, in the case of 
, an additional beam is added). This is not optional; a spellcaster cannot choose to cast a cantrip as if they were of lower level. While this is not technically upcasting, it is a similar enough process to be included here.
List of spells that benefit from upcasting
This is a list of all Spells that benefit from upcasting. It is automatically generated via Cargo.