Spellblade (5e Feat)
From D&D Wiki
Prerequisites: Strength or Dexterity 15 or higher; Intelligence, Wisdom, or Charisma 15 or higher; the ability to cast at least one cantrip
You've learned to incorporate quick attacks with your weapon right after casting a cantrip. When you use your action to cast a cantrip on your turn, you can make a melee weapon attack or unarmed strike as a bonus action.