How much plat is it to run the christmas dungeon

[GrammerPatrol]

I have 0 plat and when I click on the map it says purchase but not the amount if plat it costs. And if I were to run it would I keep having to spend plat to do so. Also is there any vanity quests thats in the christmas dungeon

[Sciazaratek]

2 plat for an elixier @ 4 hours : 40 minutes
which disappears when you kill the boss.

[Deathofan]

Go to forest haven and talk to the person next to the x-mass tree, it will give you the option to purchase it for 2plats.