Core Principle Roll a pool of dice and count successes. Dice never subtract successes. Success thresholds stay fixed; larger dice (higher Stage) raise the chance each die succeeds. Advantages change the success threshold or add dice, keeping every character able to contribute.
Pool Construction
Beast Binder Stat + relevant Talent Rank + modifiers. Always uses d6.
Arcana Beast Stat + relevant Quality Rank + Special Attack Rank when applicable + modifiers. Die size comes from Stage (see stage_die).
Stage Die
0 d6
1 d6
2 d8
3 d10
4 d12
Note Beast Binders have no Stage and always roll d6. Stage advantage (±dice) stacks with die size.
Roll Modes
Normal
Each die showing 4 or higher counts as one success.
Success Range
4+
Boost
Each die showing 3 or higher counts as one success.
Success Range
3+
Setback
Each die showing 5 or higher counts as one success.
Success Range
5+
Double Boost
Reserved for exceptional advantages. Each die showing 2 or higher counts as one success.
Success Range
2+
Double Setback
Reserved for exceptional disadvantages. Each die showing 6 or higher counts as one success.
Success Range
6+
Tests
Opposed Test Both sides roll. Higher successes wins; ties favour the defender or preserve the current situation.
Difficulty Ratings
Routine 1
Challenging 2
Hard 3
Heroic 4
Legendary 5
Costly Success When a roll misses its Difficulty by exactly one, the GM may offer success with a meaningful cost, complication, or hard choice.
Modifier Rules
Boost And Setback Cancel One Boost and one Setback cancel each other.
Stacking Two Boosts become Double Boost. Two Setbacks become Double Setback. Additional sources add or remove one die instead.
Stage Difference Stage difference adds or removes one attack die per Stage, capped at two dice. It never changes roll mode. Die size from Stage stacks with this modifier.
Elemental Matchup Elemental advantage grants Boost. Elemental disadvantage grants Setback.