Class GraftsA class graft begins with a brief description of the class and then moves on to the following sections.
Special Rules: If the graft requires some tinkering beyond the normal rules for class grafts, the graft has a special rules entry describing it.
Required Array: This entry lists which array an NPC has to use to receive the class graft.
Adjustments: These adjustments change some of the statistics provided by the array.
Skills: The class graft might also list skills, categorized as master or good, that count toward the skills granted by the NPC’s array.
Ability Score Modifiers: This lists the ability score modifiers that are usually highest for this class. They’re in order from highest to lowest, but you can mix them up as you see fit.
Gear: Most NPCs with class grafts use gear rather than relying on natural attacks. This entry gives guidelines for assigning weapons, armor, and other significant equipment to members of the class, listing the level of the gear. Gear has a minimum level of 1 and a maximum level of 20. For example, if a creature’s CR is 1/2 or if the creature’s CR is 1 and the graft suggests an item of “CR – 1,” you would give it level 1 gear. As mentioned on page 128, you can skew the creature’s gear by a few levels, though you might need to make other adjustments to its statistics if you do so.
Abilities by CR: Depending on the NPC’s CR, it gains a certain number of class features from the chosen class and potentially some special abilities of your choosing; these replace the special abilities the creature receives from the array. The NPC’s CR corresponds to its effective class level, so a CR 3 creature would be a 3rd-level mechanic.
Apply the abilities from the entry that matches your NPC’s CR or the next-lowest CR. For instance, if you are creating a CR 4 NPC and the class graft lists abilities for only CR 3 and CR 5, use the CR 3 entry. Apply only one CR entry. Class features that have a DC use the ability DC from the NPC’s array, or you can use the base spell DC if you prefer.
Usually, a class graft gives an NPC more options than it would normally get from the array. Still, if there are special abilities your NPC absolutely needs, you can add them in. Just be careful not to make your NPC too powerful for the CR you chose.
When you pick a class feature that improves another class feature, the NPC is assumed to also have all the prerequisites. For example, if you took quick inspiring boost for a CR 4 envoy, the NPC would be considered to have inspiring boost as well. If a class feature option has a level requirement, you can pick one from the lower-level set of options if you so choose. For instance, if a class graft grants a 6th-level operative exploit, you can choose a 2nd-level operative exploit instead.
Source Interstellar Species pg. 5
To add evolutionist mechanics to an NPC, you can apply the evolutionist class graft below, following the rules for class grafts found on page 137 of Starfinder Alien Archive.
Special Rules: Choose one evolutionist niche. The evolutionist creature’s niche abilities must come from that niche. Any niche abilities that aren’t relevant to the evolutionist creature can be skipped (or simply be incorporated into the creature’s statistics) and don’t need to appear in the creature’s stat block.
Required Array: Combatant.
Adjustments: +2 to Fortitude saving throws.
Ability Modifiers: An evolutionist creature should arrange its ability score modifiers depending on its focus in combat.
Melee: Strength, Dexterity, Constitution
Ranged: Dexterity, Constitution, Wisdom.
Gear: Light armor (item level = CR) and small arm (item level = CR).
Abilities by CR: All CRs: Evolution track, path
CR 1: Adaptive strike and 1st-level niche ability.
CR 2: Adaptive strike, one 2nd-level adaptation, and 1st-level niche ability.
CR 4: Adaptive strike, two 2nd-level adaptations, and 1st-level niche ability.
CR 5: Evolution drain, adaptive strike, two 2nd-level adaptations, and 1st-level niche ability.
CR 6: Evolution drain, adaptive strike, one 2nd-level adaptation, one 6th-level adaptation, and 1st-level niche ability.
CR 8: Evolution drain, adaptive strike, two 6th-level adaptations, and 1st-level niche ability.
CR 10: Evolution drain, adaptive strike, one 6th-level adaptation, one 10th-level adaptation, and 1st- and 10th-level niche abilities.
CR 12: Evolution drain, adaptive strike, two 10th-level adaptations, and 1st- and 10th-level niche abilities.
CR 14: Evolution drain, adaptive strike, one 10th-level adaptation, one 14th-level adaptation, and 1st- and 10th-level niche abilities.
CR 16: Evolution drain, adaptive strike, two 14th-level adaptations, and 1st- and 10th-level niche abilities.
CR 18: Evolution drain, adaptive strike, one 14th-level adaptation, one 18th-level adaptation, and 1st- and 10th-level niche abilities.
CR 20: Evolution drain, adaptive strike, two 18th-level adaptations, and 1st-, 10th-, and 20th-level niche abilities.
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