The Emperor Summons Thousands of Armies

The empire fell and he traveled through time to become a desperate little prince who was on the run? No way to take revenge? No hope of restoring the country? I rub... What is this? Emperor growth system? Can you summon the heroes of eternity? Can you summon thousands of heavenly soldiers? Can you also open portals to various major planes? Is this the portal of Douluo Continent? Haha, little bastards, wait for me. When I march my army to conquer thousands of miles, let you all kneel down in front of me and call me grandpa!