When you hit a creature with an attack using a Melee weapon or an Unarmed Strike, you can expend one Battle Die as a Bonus Action to infect the target's mind. The creature has the Frenzied condition until the end of its next turn.
A creature with the Frenzied condition loses the ability to distinguish between friend and foe, regarding all creatures it can see as enemies. While Frenzied, the creature chooses the targets for its attacks, spells, and abilities randomly from among the creatures it can see within range, and it must make an Opportunity Attacks if any creature provokes one.