How to develop through the skill wheel on the path to the ultimate ability

HEROES WHO CAN GAIN THE ULTIMATE ABILITY

ACADEMY:

Jalib
Zeheer (campaign)!
Nazir
Ora!
Razzak
Cyrus (campaign)
Faiz
Hafiz

INFERNO:

Agrael (campaign)!
Alastor
Lord (campaign)!
Gward (campaign)!
Grok!
Grol
Jezebeth
Daleb
Marbas
Erazial (campaign)!

SYLVAN:

Alaron (campaign)
Vinrael
Dirael
Ilfina
Talanar

DUNGEON:

Vaishan!
Irbet
Sigrif (campaign)
Kifrah
Letos
Rylag (campaign)
Sinithar
Sorgal
Shadia (campaign)

NECROPOLIS:

Vlad
Deidra!
Kaspar
Lucretia
Markel (campaign)
Naadir!
Nicholas (campaign)
Orson
Ravenna

HAVEN:

Axel
Gyr (campaign)
Vittorio
Glen (campaign)
Godric (campaign)!
Dugal
Isabelle (campaign)
Laslo
Nicholas (campaign)!
Rutger!
Frida (campaign)
Ellaina

! indicates heroes who have the necessary skill and/or ability to upgrade the ultimate ability !