Attacking and Defending

Attacking
The players roll their characters' attacks as normal

Defending
When a player is targeted by an attack, the player makes a defense roll.

A defense roll has a bonus equal to the character's AC -10. The DC for the roll equals the attackers attack bonus +11.

On a successful roll, the attack does not hit. If a character fails a defense roll, the attack hits. Advantage and disadvantage work inversely. If a player rolls a 1, then the attack is a critical hit, and a roll of 20 is a critical failure.