Leveling

Leveling up increases the Attack, Defense, and Health of a hero. It also provides a chance to level up their Special Attack. It should be noted that although leveling does make a hero more powerful, it is not possible to convert any hero into a higher tier hero. A 1* hero will always be a 1* hero, no matter how high they are leveled and ascended.

Player level up a different matter entirely and is simply a result of spending World Energy.

How to Level Up a Hero

At the bottom of the hero card you are presented with two different ways to level up your hero: "Level Up" and "Ascend". See Ascension for more on that process.

1. Choose a hero to level and select "Level Up" and you will be presented with a new screen that zooms in on the XP bar.
2. Select a hero from the list to the bottom, adding them to the queue of heroes to be sacrificed. You'll see the experience that the selected heroes has is then queued to be added to the hero that you're leveling up.
3. Click on the now-green "Level Up" button, at which point the experience will be added, and the selected heroes will be removed from your inventory.

Best Practices

• Sacrificing a hero of the same name as the one you're leveling up will give an astounding 25% chance to level up one's Special Attack for each one chosen.
• Sacrificing same-color heroes provides 20% more experience than off-color heroes.
• Sacrificing same-color heroes also provides a 2% chance (per star) to level up one's Special Attack, whereas off-color heroes only provide a 1% chance per star.
• Sacrificing 10 heroes also provides a small bonus to the chances of leveling up one's Special Attack.
• Because trainer heroes come fully ascended and leveled, the amount of experience that they provide is substantial. It is best to sacrifice them only when none of their experience is being wasted, ideally on the higher ascension tiers.

Level Caps

A hero's tier (1*, 2*, etc) determines both it's maximum level potential, as well as the number of times that it may ascend. Each Ascension also increases a hero's maximum level potential by 10. All heroes begin at the 1st tier of ascension.

Stars	1st	2nd	3rd	4th
1	10	20	N/A	N/A
2	20	30	40	N/A
3	30	40	50	N/A
4	40	50	60	70
5	50	60	70	80

A full breakdown of experience required by hero tier and level may be found here thanks to some deep investigation on the part of Muaadip. The primary moral to the story is that exp required scales progressively with each new level for both heroes and troops, as he showed in several graphs on the original forum post.