Enlightenment

Enlightenment is a very powerful way to improve your Epic Heroes beyond their previous limits. Only certain Heroes are able to attain Enlightenment, however more are added with seemingly every update. The most recent was Rath in July of 2017. It appears they plan to eventually Enlighten every Epic Hero.

Heroes

Currently every Epic Hero except Savage Chief is capable of reaching enlightenment.

Benefits of Enlightenment

Nearly every aspect of your Heroes is able to be improved through Enlightenment including: Max Active Skill level, Divine Skill level, Insight Skill max level, Fortitude Skill level, Attack, HP, Attack Rate, Skill DMG, Skill DMG Reduction, ect.

Unlocking Enlightenment

Once one of these Heroes has reached level 180 and Pisces Evolution they are able to be Enlightened by tapping on the icon in the top left corner of the Heroes Info page under the Evolution button. This will take you to the Enlightenment Interface where you can investigate all of the particulars about what benefit you get from Enlightening said Hero. If you wish to commit and unlock the Hero you must first feed 10 Ancient Spirits and 2,000 Mutagen into the first rank. The next rank requires 1 Ancient Spirit and gradually increases from there and additionally a variety of different resources including Rings, Souls, Mutagen, and Hero Shards. The resource costs are the same for all Heroes with only minor variations with exception of the Ancient Spirit cost for the newest and best Heroes for which the cost is almost doubled. So far I can confirm this list includes Stormrider and newer but not Toxic Shaman, but idk for all the Heroes in between.

Enlightened Heroes have a drastically different appearance and access to a new passive skill called Insight. Insight skills are not activated. Some are always active, while others have particular criteria which causes them to activate.

Level	Ancient Spirit	Souls	Rings	Mutagen	Hero Shards	EXP Requirement
1	10			2,000
2	1	300,000
3	1		3,000
4	1			1,000	800
5	2	300,000
6	2		3,000
7	2			2,000	800
8	3 or 5	300,000
9	3 or 5		6,000
10	3 or 5			3,000	1,200
11	3 or 5	600,000
12	4 or 7		6,000
13	4 or 7			3,000	1,600	375,000
14	4 or 7	600,000
15	5 or 9		9,000
16	5 or 9			4,000	2,000
17	5 or 9	900,000
18	6 or 10		9,000
19	6 or 10			5,000	2,800
20	6 or 10	900,000
21	6 or 10		12,000
22	7			6,000	3,200	750,000
23	7	1,200,000
24	7		12,000
25	7			6,000	3,200

Skill Level Improvements

At various Enlightenment levels your Heroes skill levels can be improved or in the case of Active and Insight Skill, they will have their max level increased.

Level	Max Skill Level	Max Insight Level	Fortitude Skill Level
1		+1
2	+1
6		+2
9	+1
11			+1
12		+2
22			+1

Attribute Choice

At various levels you are given a choice of a variety of different attributes to select. Previously unselected attributes are made available at the next rank, so once your Hero reaches level 24 enlightenment they will have all the same attributes. This only affects the order in which you receive these bonuses.

Level	Attribute 1	Attribute 2	Attribute 3
4	Insight Skill Max +5	+Stat	+Stat
7	Active Skill Max +3	Previously Unselected Attribute	Previously Unselected Attribute
10	Insight Max +5	Previously Unselected Attribute	Previously Unselected Attribute
13	Divine Skill +1	Previously Unselected Attribute	Previously Unselected Attribute
16	Insight Skill Max +5	Previously Unselected Attribute	Previously Unselected Attribute
19	Previously Unselected Attribute	Previously Unselected Attribute
22	Divine Skill +1	Previously Unselected Attribute
24	Previously Unselected Attribute