[Champion Suggestion] Iron the Gray Sentinel
Gray Sentinel: Iron Tank/Fighter
P: Taking damage and dealing damage builds rage that slowly decays if not engaged. When Maxed, changes abilities for 15 seconds. Q: Shield Rush: movement speed with shield raised reducing damage taken until contact with enemy champion or 3 seconds has elapsed. W: Ground Pound: Slam shield into ground sending straight line skill shot out that slightly damages and slows enemy Champs. E: Martial Cleave: A small delay followed by a Cleave all champs in a cone reducing enemies in the cone resistance's for 3 seconds. R: Shield Wall: Reduced movement speed with a sharp increase in all defenses.
P: Maxed Rage transforms the Gray Sentinel into Berserker with health regen but greatly reduced defense. Q: Diving Leap: Jump to selected target and deal single target damage to them. W: Howling Roar: Push all enemy champs in a radius away from Iron. E: Rapid Cleave: Three consecutive cleaves in cone that off balance enemy champs hit at least twice. R: Wild Barrage: Rapid random cones of attack alternating between four directions. Each cone being 90 degrees
Iron was a Beserker fighter in his youth, but gave that life up when duty called upon him in the form of the Sentinels. Spending years in service with others taught him how to fight as a team and how to focus his skill. Having grown gray in age, his company has became his family and all that matters in life. Tragedy struck though when the Sentinel company was betrayed, leaving Iron as the solo survivor. His rage that was unleashed while he dealt out his revenge has reawaken his past life. Now as a Man looking for purpose he seeks the balance between the Sentinel and the Berserker.
For visual reference: I picture a Graying hair and beard tall nordic Man. Who wears plate mail and carries a long-sword and great-shield until he transforms and breaks out of most of the armor and draws a great ax or other two handed weapon (Could see a Warhammer here too).