Every hero you own can use Runes once you upgrade it.
There are various types of Runes as listed below.
To add Runes I and II, You need a green hero.
To add Runes III and IV, You need a blue hero.
To add Rune V, You need a blue hero.
To remove any runes used, you can use rune picker tools to remove them safely
to reuse them. You can force extract them but this means you will lose the rune.
Tip: Untill you have the rune V, it is recommended to equip 2 pairs
of runes. for example Rune I and II from one set and Rune III and IV from another.
This allows you to gain benefits from 2 different sets together and once you have the
rune V, then you can complete the same set.
Assault Rune
Having 2 Assault Runes equipped gives your hero +15% Atk increase.
Having 5 Assault Runes equipped gives your hero +30% Atk when HP is below 50%
Vigour Rune
Having 2 Vigour Runes equipped gives your hero +30% HP
Having 5 Vigour Runes equipped gives +15% Def for deployed troops when hero skill is used.
Ward Rune
Having 2 Ward Runes equipped gives your hero +30% Def
Having 5 Ward Runes equipped gives your hero +40% Def when hero skill is used.
Robust Rune
Having 2 Robust Runes equipped gives your hero +20% Block Rate
Having 5 Robust Runes equipped gives your hero +15% when hero is hit when hero skill is used.
Swift Rune
Having 2 Swift Runes equipped gives your hero +15% Crit Rate
Having 5 Swift Runes equipped Converts crit rte to skill DMG when hero skill is used.
Resolute Rune
Having 2 Resolute Runes equipped gives your hero +35% Block Amount
Having 5 Resolute Runes equipped negates DMG 5 times within 3 seconds when hero skill is used.
Rage Rune
Having 2 Rage Runes equipped gives your hero +30% Crit DMG
Having 5 Rage Runes equipped reduces target DEF by Crit DMG when hero skill is used.
Bless Rune
Having 2 Bless Runes equipped gives your hero +30% Def
Having 5 Bless Runes equipped gives bonus SP when hero is hit when hero skill is used.
Poison Rune
Having 2 Poison Runes equipped gives your hero +15 Crit Rate
Having 5 Poison Runes equipped poisons target on hit when hero skill is used.
Thorn Rune
Having 2 Thorn Runes equipped gives your hero +30% HP
Having 5 Thorn Runes equipped reflects some DMG when hero skill is used.