The Demon King’s Champion

When the Demon King’s Champion comes into play create x 1/1 demon tokens.
{x}{t}{b} Create x 3/3 Demon commanders.
{x}{t} Create x 1/1 demon tokens
{x}{b}{t} Destroy x demon tokens. All creatures opponents control get -3/-3 until your next upkeep. Activate this ability only if you control a Demon King planeswalker.