Just an idea
First i wanna say im sorry for my english its not my first language
Many games have like daily log in award or something like that so why not league? I was thinking that it could be like you press a button and then a wheel or something like pictures are changing and then they stop and you got your award. Like usualy you will get IP. Of course not too much and not too little. And then a bit harder to get are buffs for your account like XP or IP. Then maybe RP. Then even harder random champions that you can get and the hardest - skins. I even thought about how it could look like. A silly idea but it can be like...Rumbles robot inside and like the robot has a screen and he is looking at you with big eyes and when you press the button Rumble pulls a lever and icons start passing on the screen of the robot. Or even a whole new robot that rumble created for us yay. It doesnt have to do anything with Rumble of course that was just an idea. It could be anything even a wheel.
I think that it will be pretty cool to log in and then go to this room or whatever it could be and get your "present". Also i guess that you will need to pay RP or IP to continue randomizing like second time 250 rp then 500 rp then 1200 then 3000 or something.
Thats it from me here's a cookie 