What about this for a dumb gamemode idea?

This mode would take place on a map that's bigger than Summoner's Rift and has less walls, it can be in any shape.

You can pick a champ (doesn't matter who, they'd all have the same stats for the sake of the mode) and you can pick up abilities, like Zoe's W.

You can store 4 abilities and at one use they disappear. The rarity of the spells would be determined by Riot, there would be 4 different categories. 1 being least rare and 4 being most rare. For example, Windwall would be a 3 or 4 in rarity despite it not being an ultimate, just because it's so powerful, but a Zoe R would be a 1 because it's not powerful on it's own.

You can have more than one of the same ability, and you cannot drop abilities for new ones. (To try to avoid someone getting 4 very powerful spells).

Now obviously this mode would be next to impossible to code, but hey it's cool to think about c: