How it works

The simulator pits two creatures against each other and computes exactly how the duel can end: who wins how often, after how many rounds, and with how many hit points left. It doesn't roll dice: it follows every outcome with its probability.

Quick start

  1. In each creature panel, press Load from SRD and pick a creature.
  2. Press Simulate at the top.
  3. Read the results: the bar at the top shows who wins; the timeline below shows the fight round by round.

Hover over anything for a hint about what it does.

Building a creature

How a creature decides

Reading the results

What isn't simulated
Saving throws
Defenses
Resistances
Vulnerabilities
Immunities
Condition immunities
Special traits
Absorbs

Actions

Saving throws
Defenses
Resistances
Vulnerabilities
Immunities
Condition immunities
Special traits
Absorbs

Actions