Mayuri Kurotsuchi

Whenever The Rani enters or attacks, create a red Aura enchantment token named Mark of the Rani attached to another target creature. That token has enchant creature and “Enchanted creature gets +2/+2 and is goaded.”

Whenever a goaded creature deals combat damage to one of your opponents, investigate.

"In this world, only those who control the rules can truly shape them."