My Engagement Was Broken Off, and I Summoned Billions of Demon Gods at the Beginning

My fiancée broke the engagement in public and called me a useless practitioner. She doesn't know that I have awakened the ancient summoning technique and can summon the gods and demons of the ancient world at will. When there were billions of demons standing behind me, she cried and begged to get back together. I chuckled: "Now, you are not even qualified to carry my shoes."