I am trying to find out what the glowing icons are above defences…. I had some above my reapers but they disapeared and now I a some above the sniper towers …. how do y get them …do they just randomly appear …what do they do.
It depends on the hero. Your Guild Bot buffs nearby towers with increased attack % and attack rate %, this will give a small glowing icon.
Then there’s heroes with specific Fortitude Evolutions that buff certain buildings. All the following heroes will give a glowing icon above their respective buffed buildings:
Arctic Lord – Reapers
Renee Ven – Victory Statues
Demon Slayer – Cannon Towers
Pan Goli – Archer Towers
Hydrasaur – Air Defenses
Blitz Bomber – Tesla Towers
Pounder – Mortars
Skull Mage, when dead – A single tower until tower gets destroyed, then inhabits the next nearest tower.