Someone please AI generate a Tarrasque riding a tiny bicycle.

One time I asked “Do you think I could go fast enough on my bike to escape from a werewolf?” The answer was “I don’t know, does the werewolf also have a bike?”

I was going to send this to my DM, but then I remembered that he would absolutely do it.

if that’s the case for the campaign I’m currently a player in, the fight will have -7 tarrasques

I had used one as the BBEG in a campaign I ran once. It was strictly for a their tier 4 climax and they had multiple side quests to help get some advantages like overcoming the spell resistance or temporarily stoping the health Regen. However, I also gave the Terrasque a ranged attack, and a few extra abilities so the players couldn’t metagame and fly and kite.

And they had to figure out a way to trap the monster in a canyon.

Even still I dropped every PC to 0 health at least once in that encounter before they won. A real nail bitter.

It was one of the top five boss fights I ever was a part of on either side of the screen.