Most of the time when you roll in Echelon, you’ll be using ‘Advantage Dice’.
- Roll all the dice you are entitled to (or can con the GM into allowing).
- Pick the highest one.
- For each value rolled, add one for each die after the first that rolls that value.
This is often compared to a target number (TN) to determine success, or the value used as rolled. In some cases a margin of success is also used, and is found by subtracting the target number from the value rolled.
The above is a pretty abrupt summary, so a bit of explanation is in order
Echelon assumes competence in higher-tier creatures. All else being equal, a higher-tier creature will be able to use bigger dice, and are likely to have more relevant talents that provide dice. They are thus more likely to succeed at tasks than lower-tier creatures attempting those same tasks.
Each tier has a die associated with it. From lowest tier to highest tier, these are
Each creature starts with one advantage die based on their tier. Amren-ja, a character in the Champion tier always rolls at least 1d10 when rolling advantage dice.
A creature can also add a die for the best relevant cornerstone, common, and capstone talent, based on the tier of that talent. Only one die can be added for a cornerstone talent, one for a common talent, and one for a capstone talent (up to three total). Most talents are relevant to at least one skill or type of roll, in addition to providing qualitative benefits (let the creature do something that otherwise could not be done).
Target Numbers and Fixed Results
Each tier has a base target number equal to half the size of the tier die plus one. This means that given a single die, a character of that tier has a 50% chance of succeeding at any particular check. If a creature gets multiple dice the chances of failure is (approximately) halved with each additional die: 50% success (50% failure), 75% success (25% failure), 87.5% success (12.5% failure), 93.75% success (6.25% failure).
If the test is intended to be unusually hard or unusually easy, add one or subtract one point from the target number, plus one more if it is a legendary test, for each degree of change.
I don’t know how often tasks would be made ‘easier’, but they’re included for completeness.
The numbers above approximate the median values when rolling one die (base), two dice (hard), three dice (harder), and four dice (hardest) of the tier size. That is, a ‘harder heroic test’ has a TN of 7. A heroic creature rolling 1d8 will succeed about 25% of the time, but a heroic creature rolling 2d8 will succeed about half the time. This is not precise! But the numbers were chosen to be easy to remember.
At times a creature might make use a fixed result (much like the ‘Take 10’ mechanic in the Pathfinder Roleplaying Game). In this case the character can use a fixed value based on their tier die (‘base’ in the table above), plus one for each die within two steps of the tier die, plus another one for each d20 after the tier die.
For instance, a creature rolling 3d12 would have a fixed result of 9 (7+2). A creature rolling 1d10+1d2 (champion-tier character making an unarmed attack, say) would have a fixed result of 6 (the d2 is much too small to have significant influence on the outcome). A character rolling 4d20 would have a fixed result of 17 (11+6).
Example: Amren-ja, Warrior Queen (Champion Tier)
Amren-Ja has the following talents:
- Emon Warrior Tradition (a cornerstone talent) at the Champion tier (d10)
- Axe Mastery (common talent) at the Champion tier (d10)
- Mounted Combat (common talent) at the Hero tier (d8)
- Mounted Archery (common talent) at the Veteran tier (d6)
- Fierce Doom Rider (capstone talent) at the Veteran tier (d6)
When Amren-ja fights, she applies these talents depending on circumstances (dice rolled for each circumstance, with the relevant talents marked in [square brackets]):
- 3d10 when attacking with an axe [Emon Warrior Tradition, Axe Mastery]
- 2d10 when attacking with a spear [Emon Warrior Tradition]
- 2d10+d6 when attacking with a bow, from chariot [Emon Warrior Tradition, Mounted Archery]
- 2d10 when attacking with a sword, from chariot [Emon Warrior Tradition]
- d10+d8 when attacking with a bow, mounted [Mounted Combat]
- d10+d6 when attacking with a bow, on foot [Mounted Archery]
- 2d10 when navigating her chariot around a obstacle or hazard [Emon Warrior Tradition]
- 1d10+1d8+1d6 when navigating her mount around an obstacle or hazard [Mounted Combat, Fierce Doom Rider]
- 1d10 when fighting with a mace.
In almost all cases she will end up rolling between 1 and 10, with the values tending to be higher when more dice are involved. In fact, she can roll slightly higher than 10 if she’s got multiple dice (2d10, or 1d10 plus two other dice), but this will be pretty uncommon.
Some sample rolls:
|Axe (3d10)||Riding (1d10+d8+d6)||Bow, Mounted (1d10+d8)||Mace (d10)|
Similar rules apply when determining effect (damage in a fight, for example). Amren-ja wields Desert’s Bite, a greataxe of wounding. When she attacks with it, she does d10 (tier) + d8 (greataxe) + d10 (wounding) = 2d10+d8 damage (which will probably be about 7-8 points of damage per attack, before margin of success).
Most talents don’t add directly when determining effect, but they usually have indirect effect via margin of success.