This debuff is easily distinguished by a circle of stars above the head of the affected target. Accuracy is greatly diminished, making it more likely to miss an attack on the opposing team. Since this effect lasts for two turns, it is very effective at neutralizing the attacks of very strong heroes, and is most likely the deciding factor in a PvP match.
Inflicting Daze in campaign maps will help your Healers keep up with healing duties. On the other hand, Dwarves and other Samurai heroes with the Perfect Swing -like passive are unfazed by the Dazed debuff. In addition, special abilities that heal and buff their own team are not affected by Daze.
Heroes
The following heroes have or can inflict/apply Dazed:
Charm (Special Attack): Ranged Physical attack that Charms the target into attacking their allies with Basic Attacks. Target enemy is also Dazed after the Charm effect has expired. The Charm never misses although the damage done can. Kiss of Death (Special Attack): Melee Physical attack that Dazes the target and deals 2.5x damage if the target has 50% HP and below.
Barrel Toss (Special Attack): Ranged Physical attack on all enemies that inflicts a random Debuff on each enemy hit, then buffs team +DEF. Astounding Pounding (Special Attack): Melee Physical attack with a chance to Daze or Provoke.
Jack in the Box (Trait): When in a team with Cruel King Bramble all Goblins in the team have increased dodge chance and have a chance to apply paralyzed or dazed on hit. This hero can't be cloned.
Axe of Tor (Epic): Chance to attack up to 3 enemies for 1.5x damage, Daze, and Burn.
Immunity
Aria, all Dwarfs and the Samurai of the Honorbound heroes are virtually immune to Dazed effect because they have traits similar to Perfect Swing and never miss.
Dryad Ice (Trait): Starts dungeons in Ice Block, reducing damage taken (90% Damage Reduction) and Debuff immune until their first turn. Can't be stolen, copied, or purged.
Ambush Tactics (Special Attack): Ranged Physical attack on target enemy and all Ranged allies attack the same target, then gain Stealth and become Invulnerable for 1 turn. Starts Powered.
Ice Block (Trait): Starts dungeons in Ice Block, reducing damage taken (90% Damage Reduction) and Debuff immune until his first turn. Can't be stolen, copied, or purged.
The Last Word (Trait): Slow allies and self take 30% reduced damage from Fast enemies. Slow allies revenge attacks twice. Slow allies can't have buffs removed or debuffs added by fast enemies.