The Enlarge/Reduce spell can make a creature one size category bigger.
Considering that two spell effects of the same nature cannot stack at the same place and time (you can't cast two Enlarges on the same Medium target to make it Huge), is there another way (spell, item, etc.) to increase a target's size category that could be stacked with the Enlarge effect in order to increase the target's size category twice ?
Best Answer
I believe it is possible if you're one lucky WM sorcerer.
Per the Wild Magic sorcerer's Wild Magic Surge table (PHB, p. 104), if you roll the d100 and get a result of 93-94:
It doesn't specify that you cast enlarge/reduce on yourself. In other cases, it explicitly states that you "cast" spells:
and so on.
So enlarge/reduce the spell and the wild magic enlarge effect aren't spell effects of the same name and can be stacked.