You're a Mean One, Mr. Grenth

Overview
Summary
 * 1) Speak to the Rift Warden when you are ready to enter the Underworld.
 * 2) Recover all the stolen presents. x of 5 gift bundles recovered.
 * 3) See Rift Warden for your reward.
 * * BONUS*: Survive for as long as possible.

Obtained from
 * Rift Warden in Kamadan, Jewel of Istan
 * or
 * Rift Warden in Lion's Arch

Reward
 * 1,000 Experience
 * 5 Candy Cane Shards

Dialogue
 * "Grenth's sniveling lackeys will stop at nothing to claim victory this Wintersday Festival. They have stolen countless gifts from the good little boys and girls and hoarded them deep within Grenth's domain. Dwayna beseeches you to go forth into the icy depths of the Underworld to recover the presents. Won't somebody think of the children?"
 * Accept: I'm thinking the children will have a grand Wintersday. Lead me to the fight!
 * Reject: I'm thinking of the children right now. Miserable little buggers...

Intermediate Dialogue (Avatar of Dwayna)
 * "May Dwayna's light guide you through this land of ice and death. In recovering the stolen presents from the clutches of Grenth's minions, you have brought goodness to this world. So tell me, are you ready to leave this frigid place behind?"
 * Take me to Lion's Arch.
 * Take me to Kamadan (sic)
 * I want to play the bonus challenge.

Reward Dialogue
 * "The Avatars of Dwayna speak highly of you. With your help, Dwayna is one step closer to victory this Wintersday."

Walkthrough

 * In order to "capture" the presents you must clear the enemies from around each gift bundle and stand by it. In the Mission Progess section of your interface a bar will measure your capture progress. Red means the enemy control the gift bundle, while blue means you have captured it.
 * You can stay away and wait for all the enemies to spawn and then kill them one by one. Note: If you kill the last Grentch to spawn each round, the wave will be considered complete regardless of other living Grentches that may have spawned previously.
 * Consider playing a Ritualist for the skill Jack Frost. You and the spirit effectively do twice the damage and it can take hits for you while you hide behind and attack. To do the bonus cast Jack Frost just in front of the presents and stand behind it in the corner. Let incoming enemies attack the spirit while you both attack. Recast Jack Frost if he gets too battered.
 * Elementalists are a good choice for their skill Icicles. Because it isn't a projectile you can hide behind a wall and cast it on your enemies.
 * Flashy Grentches interrupt your first spell, so cast something you don't need to use so it doesn't matter when they interrupt it.

Trivia

 * The name of this quest is an obvious reference to the song You're a Mean One, Mr. Grinch.