Roll some dice.
The DiceBot can understand lots of variations. "Roll", "Roll 3", "Roll d8", "Roll 20 six-sided dice", "Roll d20 with Advantage", "Roll d20 ADV", et.al.
The DiceBot can create D&D characters. "Create a character", "Create a Druid", "Create a halfling rogue", et.al.
Note: While we can create all recent D&D 5e character types, currently we only expose those from the Wizards of the Coast SRD. Because, you know, something something laywers.