Formula Guide

Creating Custom Dice Formulas

Learn how to create and customize dice formula templates for Mythic GME Mobile. This guide covers everything from basic dice notation to advanced features like exploding dice and success counting.

Template Structure

Each formula template is a JSON file containing:

formulas: Array of formula objects
version: Template version (currently "1.0")
schemaVersion: Schema version (currently "1")

{
  "formulas": [
    {
      "formula": "2d6",
      "name": "Basic Roll",
      "description": "Roll two six-sided dice"
    }
  ],
  "version": "1.0",
  "schemaVersion": "1"
}

Supported Dice Notation

Basic Notation

2d6 - Roll 2 six-sided dice
1d% or 1d100 - Roll percentile dice
1D66 - Roll D66 (1d6*10 + 1d6)

Advantage/Disadvantage

2d20kh - Advantage (roll 2d20, keep highest)
2d20kl - Disadvantage (roll 2d20, keep lowest)

Keeping/Dropping Dice

4d6-L - Roll 4d6, drop lowest
4d6-H - Roll 4d6, drop highest
4d6-L2 - Roll 4d6, drop 2 lowest
3d20k2 - Roll 3d20, keep 2 highest

Exploding Dice

4d6! - Roll 4d6, explode on maximum (6)
4d6!5 - Explode on 5 or higher
4d6!o5 - Explode once on 5 or higher

Success Counting

4d6#>3 - Roll 4d6, count results greater than 3
6d6#s>=5#f<=2 - Roll 6d6, count successes (≥5) and failures (≤2)

Quick Start Guide

Download the blank formula template Download Template
Open in any text editor
Add your custom formulas using the notation above
Save with a .json extension
Import into Mythic GME Mobile