As everyone knows Riot loves to do skin themed events from time to time which are awesome and we get fun game modes to do alongside them.
However, my absolute favorite skin line that hasn't been touched in two years now could really use a couple fresh skins - Elderwood.
I know a lot of players absolutely love this skin line and some of the best player made concepts come from the Elderwood line. For example Elderwood kindred is extremely popularly and yes i may be biased burn Elderwood Rakan and Xayah attract a lot of attention as well.
For the game mode I was thinking Something called "Elder Tree Defense" where 5 players would spawn in a grove and have to protect the Tree which is just a nexus redesigned to look like a tree from being overrun by some sort of creatures, and yes boss fights would be awesome to include in here as well.