New Featured Game Mode: Fire vs. Ice

I have a suggestion for a featured game mode which would at it's most basic level be quite simple to implement: Some friends and I like to occasionally set up a custom on Howling Abyss game with the following rules: –––––––––– TEAM1=ICE / TEAM2=FIRE FIRE=Brand, Annie, Shyvanna, Ziggs, Rumble, Ornn or champs with fire themed skin. ICE=Braum, Ashe, Trundle, Nunu, Lisandra, Anivia or champs with snow or ice skin. ––––––––– However, setting up such a match is quite complicated because:

1. players don't have access to all the fire or ice champs.
2. players may not have access to any or very many fire or ice themed skins.
3. no matter how many time you paste in the rules in chat during setup, some players will misunderstand, and choose the wrong champion or skin type for their team or the entire event.

My suggestion is for Riot to create an event mode based on Howling Abyss, but where all the appropriate champs for either fire or ice are unlocked for the appropriate team... in addition, champs with fire or ice themed skins would also be available and unlocked just for the game... so for example, a fire team player could choose Shyvanna, while an ice team player could choose ice drake shyvanna. Zigs vs. snow day zigs, annie or snow day annie, infernal nasus and infernal zyra available for fire team... brand on fire, cryocore brand on ice team... etc.

The fun part of this mode is the visual of one team spewing massive amounts of fire and explosions while the other team throws ice and snow... it plays well into the elementals which Riot is now emphasizing as well. And the icing on the cake would be to customize Howling Abyss for the event where:

1. The landscape and map could shift from frozen on one end to parched and burnt on the other, and the landscape changes would move across the bridge / map as one team broke objectives or was ahaead in kills, etc... and finally, if fire team had some special item for the mode that would be a sort of firebomb or whatevr with a big fire effect and ice team had the equivalent item which could freeze/stun people or something...

Anyway, overall it could be implemented fairly easily by just creati ng a mode where a range of fire-themed characters were available and unlocked for one team and ice themed for another.