Group 1:
May 13, 7:00 until May 14, 6:59 PST
(May 13, 8:00 until May 14, 7:59 PDT)
- Fire: Alpha
- Water: Tridon
- Earth: Lucca
- Thunder: Diana
- Light: Melchio
- Dark: Semira
Group 2:
May 14, 7:00 until May 15, 6:59 PST
(May 14, 8:00 until May 15, 7:59 PDT)
- Fire: Darvanshel
- Water: Tazer
- Earth: Fang
- Thunder: Rowgen
- Light: Yujeh
- Dark: Ivris
Group 3:
May 15, 7:00 until May 16, 6:59 PST
(May 15, 8:00 until May 16, 7:59 PDT)
- Fire: Claire
- Water: Oulu
- Earth: Tora
- Thunder: Orna
- Light: Eva
- Dark: Lilly Matah
Group 4:
May 16, 7:00 until May 17, 6:59 PST
(May 16, 8:00 until May 17, 7:59 PDT)
- Fire: Ultor
- Water: Colt
- Earth: Rosetta
- Thunder: Kanon
- Light: Narza
- Dark: Kuda
Group 5:
May 17, 7:00 until May 18, 6:59 PST
(May 17, 8:00 until May 18, 7:59 PDT)
- Fire: Ulkina
- Water: Rigness
- Earth: Quaid
- Thunder: Exvehl
- Light: Kira
- Dark: Shida
Group 6:
May 18, 7:00 until May 19, 6:59 PST
(May 18, 8:00 until May 19, 7:59 PDT)
- Fire: Ciara
- Water: Elimo
- Earth: Farvnil
- Thunder: Zedus
- Light: Fadahl
- Dark: Feeva
During the whole period of Popular Heroes Campaign, a bonus unit will be given for every 5 summons!