I was thinking about the Christmas event and instead of double experience I thought of this idea.. Having a chest placed somewhere like varrock or edgeville that needs to be unlocked with a "Christmas key"
Christmas Keys
These Christmas keys are obtained through any type of Skilling (fishing, minning, herblore, cooking, crafting etc.) Randomly. It can be like a 1/75 chance to get a key.
ALSO these cans can be obtained as a random drop from monsters(Maybe all monsters 75+ combat so people won't kill goblins and get keys so easily?) There would be a specific drop rate on the keys so they aren't flooded (maybe 1/200)
OR
Santa clause needs your help!
Another idea could be to to introduce "Santa clause" and there is evil elves (elf warriors or other attackable elves) who have stolen Santa's keys to his "goodies". only these elves drop the Christmas tree chest keys. Kill off these elves for a chance to get your hands on Santa clause's precious loot!
It's snowing
Within this idea, you can possibly make it snowy and people can make snowballs by collecting snow off the ground and throw them at other players having a snowball fight.
Loot from Christmas Chest
Common
Bones
Runes
Tuna
Cake
Adamantine armour
Gems
Herbs
Rare
Rune items
Everything common except higher quantity
Rune and adamantine bars
Shark
Swordfish
Dragon bones
Dragonstone
Ultra rare
WHITE GLOVES?
Hat and scraves (this is more reasonable)
Black santa hat
Christmas tree hat
Christmas cracker (not sure if this is a good idea due to party hat prices going down due to more in game)
SLEDS
Reindeer hat
Note: obviously the loot table can be revised and all the ultra rares don't have to be included but it's some sort of idea I had and a good way to Introduce new rares
URLS to items:
Scraves
http://oldschoolrunescape.wikia.com/wik … nd_scarves
Reindeer hat
http://oldschoolrunescape.wikia.com/wiki/Reindeer_hat
Sleds
http://rscrevolution.wikia.com/wiki/Sled
Black santa
http://rscrevolution.wikia.com/wiki/Black_Santa_hat
Elf warrior (for Santa needs your help idea)
http://rscrevolution.wikia.com/wiki/Elf_warrior