diff --git a/packages/core/src/game.ts b/packages/core/src/game.ts
index 71d5fa8..166ed92 100644
--- a/packages/core/src/game.ts
+++ b/packages/core/src/game.ts
@@ -19,13 +19,17 @@ export { pull } from '@/talent'
 
 import { replacement, additionalPoints } from '@/talent'
 import type { ReplacementResult, AdditionalPoints } from '@/talent'
+import type { RNG } from '@remake/vitex'
 
 export interface TalentsPickedResult {
     talents: ReplacementResult
     additionalPoints: AdditionalPoints
 }
-export function talentsPicked(talents: Iterable<Talent['id']>) {
-    const r = replacement(talents)
+export function talentsPicked(
+    talents: Iterable<Talent['id']>,
+    rng?: RNG,
+): TalentsPickedResult {
+    const r = replacement(talents, rng)
     const ap = additionalPoints(r.talents)
     return { talents: r, additionalPoints: ap }
 }
@@ -63,16 +67,20 @@ export interface NextResult {
     end: boolean
 }
 
-export function next(state: GameState, profile: ProfileState): NextResult {
+export function next(
+    state: GameState,
+    profile: ProfileState,
+    rng?: RNG,
+): NextResult {
     let s = produce(state, draft => {
         draft.props = propsEffect(state.props, { age: 1 })
     })
     const age = s.props.current.age
-    const tr = talentTrigger(s, profile)
+    const tr = talentTrigger(s, profile, rng)
     const events = ages
         .get(age)!
         .event.filter(([e]) => eventCheck(e, tr.state, profile))
-    const event = pickWeight(events)!
+    const event = pickWeight(events, rng)!
     const er = eventTrigger(event, tr.state, profile)
     const ar = achievementTrigger('TRAJECTORY', er.state, profile)
     const end = ar.state.life < 1
diff --git a/packages/core/src/talent.ts b/packages/core/src/talent.ts
index d3dd8a4..5594bc6 100644
--- a/packages/core/src/talent.ts
+++ b/packages/core/src/talent.ts
@@ -4,7 +4,7 @@ import type { Properties } from '@/state'
 import type { GameState, ProfileState } from '@/state'
 import { propsEffect, createFlatState } from './state'
 import { check } from '@remake/condition'
-import { pick, pickWeight } from '@remake/vitex'
+import { pick, pickWeight, type RNG } from '@remake/vitex'
 import { produce } from 'immer'
 import type { TriggerResult } from '@/game'
 
@@ -64,7 +64,7 @@ export interface PullOptions {
     rate: RateOptions
 }
 
-export function pull(options: PullOptions, profile: ProfileState) {
+export function pull(options: PullOptions, profile: ProfileState, rng?: RNG) {
     const rate = Array.from(
         talentRateWithAddition(options.rate, profile).entries(),
     )
@@ -72,10 +72,10 @@ export function pull(options: PullOptions, profile: ProfileState) {
     if (profile.lockedTalent) result.push(profile.lockedTalent)
     const map = new Map(Grades.map(g => [g, new Set(GradeMap.get(g))]))
     for (let i = options.count - result.length; i > 0; i--) {
-        const grade = pickWeight(rate)! ?? 0
+        const grade = pickWeight(rate, rng)! ?? 0
         const set = map.get(grade)!
         if (set.size === 0) continue
-        const id = pick(Array.from(set))!
+        const id = pick(Array.from(set), rng)!
         result.push(id)
         set.delete(id)
     }
@@ -100,23 +100,23 @@ export function exclude(talent: Talent['id'], list: Iterable<Talent['id']>) {
     return null
 }
 
-function chainReplace(t: Talent['id'], ts: Set<Talent['id']>) {
+function chainReplace(t: Talent['id'], ts: Set<Talent['id']>, rng?: RNG) {
     const { replacement: r } = talents.get(t)!
     if (!r) return null
     let picked: Talent['id'] | null = null
     if (r.talent) {
         const filtered = r.talent.filter(([id]) => exclude(id, ts) == null)
-        picked = pickWeight(filtered)
+        picked = pickWeight(filtered, rng)
     } else if (r.grade) {
         const filtered = GradeMap.get(r.grade)!.filter(
             id => exclude(id, ts) == null,
         )
-        picked = pick(filtered)
+        picked = pick(filtered, rng)
     }
     if (!picked) return null
     const nts = new Set(ts)
     nts.add(picked)
-    const next = chainReplace(picked, nts) as Talent['id'][] | null
+    const next = chainReplace(picked, nts, rng) as Talent['id'][] | null
     if (next) return [picked, ...next]
     return [picked]
 }
@@ -126,11 +126,14 @@ export interface ReplacementResult {
     chains: Map<Talent['id'], Talent['id'][]>
 }
 
-export function replacement(list: Iterable<Talent['id']>): ReplacementResult {
+export function replacement(
+    list: Iterable<Talent['id']>,
+    rng?: RNG,
+): ReplacementResult {
     const set = new Set(list)
     const chains = new Map() as ReplacementResult['chains']
     for (const talent of list) {
-        const chain = chainReplace(talent, set)
+        const chain = chainReplace(talent, set, rng)
         if (!chain) continue
         chains.set(talent, chain)
         chain.forEach(t => set.add(t))
@@ -173,6 +176,7 @@ const EffectRandomProperties = [
 export function trigger(
     state: GameState,
     profile: ProfileState,
+    rng?: RNG,
 ): TriggerResult<Talent['id']> {
     const flatState = createFlatState(state, profile)
     const triggers: Talent['id'][] = []
@@ -196,7 +200,7 @@ export function trigger(
             if (effect.MNY) pe.money = effect.MNY
             if (effect.SPR) pe.spirit = effect.SPR
             if (effect.RND) {
-                const key = pick(EffectRandomProperties)!
+                const key = pick(EffectRandomProperties, rng)!
                 pe[key] = (pe[key] ?? 0) || effect.RND
             }
             draft.props = propsEffect(draft.props, pe)