Official Description:Biala being the home of Santa, Christmas is really important. Blitzen is one of Santa's reindeer and he needs your help to get enough items in time for Christmas. Viottos work for Santa too, and therefore the pet species is limited. If you can help Blitzen and complete his 30 missions he will reward you greatly. Blitzen will give you a mission every day, as long as you haven't already completed another mission in the same day. You will need to collect a certain item for him within a certain time limit. At level 1, all items asked for will be rarity 1 - up to level 30 where all items asked for will be rarity 30. He usually asks you to collect just one item, however he can ask for up to 3. If you fail to bring any of them, you will have to start again.
Items Asked For Per Level: This is the tricky part. Blitzen will not ask for specific items like other missions. That is, Blitzen will ask for ANY item according to its rarity successively until it reaches level 30 - in which it will ask for a rarity 30 item (such as limited edition potions and AU items, which more than barely make up the MP reward at the end). DO NOT take Blitzen lightly! He's not called the "Evil Deer" for nothing! Indygo's Blitzen Item Listis a must; it will help you look at the items Blitzen might ask for in the higher levels.
Since the addition of the Sewer Cleaner, Blitzen has taken a back seat to being the hardest. However, as more items are being released onto the site and few being available again through Account Upgrades and Time Machine, Blitzen has become a double-edged sword of a mission.