Make character bigger on 1 level only?

Hi. I need to have my character’s size increated just for 1 level. How can this be achieved? Should I create a new gamemode and alter something throguh it?
I am a novice so please leave some details! ))

Also one bump please!

You could do it a number of places. The level blueprint might be a good place to start. Try to scale your character’s pawn on the event begin play of the level blueprint where you want him/her to be bigger.