The “d20” approach (see too the d20 System) is common in many game systems that leveraged the original D&D idea of a 20 sided die with ‘levels’ of capability vs. a targeted difficulty for resolving outcomes of actions.
Keep in mind, that any system or author can use the iVerse™ materials in any way they see fit. Individual GMs may alter or “homebrew” their own variants. Everything is Creative Commons licensed – a citation/link back to the source is all that’s required.
CHECK RESULT OUTCOME/QUALITY: Health (HP), damage, and other factors use a measured outcome scale for damage or effect. That average is to be used unless noted in materials. All outcomes for skill checks follow provisions in the d20/DnD 5™ Skills -> i20 Features mapping.
ABILITY SCORES + SANITY: There are 7 (Attribute) values, adding Sanity. Sanity is used to make horror/terror/fear checks, typically replacing Wisdom and Charisma. All races have a starting Sanity of 11, 10 for half breeds. It is generated however each GM desires it to be depending on their preferred method used (points, rolls, etc.).
EXPERIENCE POINTS: Incarna does NOT use “Experience Points” (XP) for advancement. Improvement/advancement is based on the story and story milestones and approved use of Character Points (which are awarded like XP, but there are different ways of gaining them) or Character Weaves (which alter immediate outcomes – like “hero points” or “action points”).
Health, Damage, Resting and Recovery: Health is the measure of Hit Points (HP). Damage and Recovery are more lethal. Hit Dice are not rolled for healing! A Short Rest is a full night of rest, after which time characters regain 1 + their Constitution bonus (min of 1) in HP. Exhaustion is recovered at 1 measure per Short Rest. A Long Rest is a full week of rest (after which time character regains their full HP). Wounds (see hereafter) can inhibit this, and quality of care and conditions can adjust this.
These are critical changes to how magic works – review carefully!
ASSIGN A MYSTIC TRADITION: Any magical capabilities come from the Mystic Traditions of Inspiration or Spark. When they Manifest spell type capabilities, it is using the Invocation practice of Casting.
ENCUMBERED CASTING: Spell casters need to abide by Casting Constraints for rules on casting encumbered. It pays to be without any encumbrance/load/burden.
IDENTIFYING MAGIC ITEMS: Use of the Identify spell to discern specific magical Dweomers and Auras of items, places, etc. is generally replaced with the Rituals of Knowing. See Identifying Items for basic dweomer/aura assessment and the Items and Services for the setting the character is in.
ESSENCE: All things have Essence, with Higher Order beings having more. Many classes require the character expend a small amount of Essence in order to be able to use their related capabilities upon The Pattern. It is also used for Bindings and Attunements, returning at 1/Short Rest once it is no longer used for this. It can be used to barter for powers and enhancements with powerful creatures (like “selling your soul”) capable of granting such.
RESILIENCE OF ITEMS: The Incarna basic Resilience rules for items are used. Every point of Resilience can be used to shift the Quality of Result down, at the expense of using the item to take the blow and reduces its long term effectiveness. For example, a medium light shield has 1 Resilience – it can absorb 1 blow. Resilience can be restored by an appropriate crafter or technology, usually for a cost.
A character who is “Wounded” suffers immediate (damage) and longer term effects. The source of the wound may describe other specific effects, but always cover the following: 1) The target gains a level of Exhaustion (cumulative, to a maximum of 5 – i.e. cannot kill), 2) Their sequence of Death Saves starts with one failure. They lose any advantage on their physical ability checks, and lose 5′ of movement. A character automatically becomes Wounded when:
Minor Wound: The effects of 1 Minor Wound are negated after a Short Rest is completed; Additional ones each take a Short Rest.
Grievous Wounds can only be healed with Regenerate spell, which only completes after a full Long Rest.
If not covered elsewhere in this synopsis, the following changes also apply:
Advancement on Story: It follows the general Story Advancement guidelines of average challenge, levels 3-8 for d20™ versions. Instead of character powers and health regaining swiftly, that pace is slowed to something more realistic following the “Gritty Realism” principles.