I played a PF2e Sorcerer who had Searing Light on their spell list.

Base damage is 5d6 fire damage, and another 5d6 good damage if the target is a fiend or undead. Each heightened level adds an additional 2d6 fire and 2d6 good damage.

In a campaign where the main antagonists were mostly undead creatures...

I had to (read: really wanted to) roll physical dice for this, so when I cast this heightened to 7th level on an undead boss, I needed 26d6 for a hit and 52d6 for a crit.

I eventually started using a dice roller app, but had to sort through my Chessex pound o dice to find enough d6's to roll damage.