Attack Speed is what determines the order of your heroes' attacks. The speeds are Fast, Normal, and Slow, where fast Heroes attack first, then normal, followed after by slow heroes. Any hero that is not identified as nor by the corresponding Traits on their hero card is normal speed. Knowing the order of attack is important when you plan a Dungeon Raid or check out the The Tower of Pwnage.
Attack Order in PvE
In Dungeons all heroes attack first, one by one as selected (left to right). Then all enemies strike back. This is the fast speed phase of the round.
After that, in the normal speed phase, all normal heroes can do an action, followed by all enemies.
Last but not least, in the slow speed phase, all heroes attack, followed by all enemies.
Attack Order in PvP
First, the first defender attacks, followed by the first attacker. Then, the next defender attacks (if present and alive), followed by the next attacker. If one side (attacker or defender) has no fast heroes, it's the turn of all fast heroes of the other side before the normal heroes have their turn.
The normal speed phase works the same, just for normal speed heroes. First normal speed defender attacks, followed by first normal speed attacker. Then next normal speed defender, followed by next normal speed defender, etc.
Finally in the slow speed phase, the slow heroes can perform their actions, one by one, first slow defender begins.
The Impact of Selection Order
Important: All heroes attack in order of their speed and their selection order, from left to right. If you select a team of
|Order of selection|
then the effective order in which your heroes' turn is (left to right):
|Order of attack|
Read more in My Dungeon, How Targeting Works (The AI Explained).
The Impact of Debuffs
Revenge Attacks happen immediately after the attacker landed their hit.
The Slowed debuff makes the target slow and attacking last for a few rounds.