Someone has been telling me that I cannot cast eldritch blast twice a turn, because by some rule you are only able to cast one spell and one cantrip a turn, regardless of casting time. I trust his judgment, but I want to confirm.
I have always been familiar with the stuff you get during combat: One action, one bonus action, and one reaction. It doesn't make sense that I can't use an action to cast eldritch blast, then use Quickened Spell to make the casting time a bonus action, and then use eldritch blast again.
Can you cast eldritch blast twice in the same turn using the sorcerer's Quickened Spell Metamagic option?