Talk:Vermax/@comment-75.4.131.188-20140330002624

This is actually what they do for the boss collections. Check out this page and here is the section. They increase it for each boss in the collection to make it harder to get the reward.

Winter Kings
 * 56. Jack Frost (December 12, 2013) - 5% higher stats than regular Epic Bosses after Level 15
 * 57. Krampus (December 19, 2013) - 10% higher stats than regular Epic Bosses after Level 15
 * 58. Glacius (December 27, 2013) - 20% higher stats than regular Epic Bosses after Level 15