How many times do I have to kill The First Dragon to collect all the items needed for the Festive outfit?

Question

Hello Dear Tibians!

Today I'm here to ask you two related questions:

1. Knowing we need 03  Porcelain Mask and 50  Colourful Feathers to complete the addons 1 and 2 of Festive Outfit, how many times do I have to kill The First Dragon to collect all of these items? 
2. Is it possible to complete the outfit and both addons during one event without buying any item?

Answer 1

Loot from boss

• 3x  Colourful Feathers always
•  Porcelain Mask (cooldown 5days)

You can fight with boss every 20 hours.  Event duration: 16.01 - 12.02.  It turns out that you can get an outfit without buying items. Every 5 days one mask boss killed 3 times, 18 times boss every 20 hours for 50 feathers..