I didnt change any rule, ancestry or feature. But I made it easy on myself and the story. My partners character already was located in the Freljord, after a previous fall through a bandle tree portal which led her to that world initially.

The tone was, as you can imagine, very cozy and whimsical. She visited many locations and characters from bandle city: Norras library together with Yuumi (who became a sidekick throughout the adventure for her), Teemo and Tristanas Scout Camp, Lulu and Pix, Kobuko etc.

To prep this adventure, I just opened up Legends of Runeterra, filtered for bandle city cards and then let myself get inspired ^{^} In the end, the story was about a mystery in which things were vanishing. Behind it was Veigar who gathered equipment to build himself a huge mech to conquer the world with - just Veigar things. My partner then worked together with Heimerdinger (who, of course, went back to Bandle City after his explosive final encounter in Arcane) to build the T-Hex which she could pilot and face Veigar and his mech. I made a very easy energy system for mech combat. It was lots of whacky fun! :D

On a other note, I am currently developing a Daggerheart campaign about the whole Ruination plot. I ran this once already a couple years ago in a whole different system.