diff --git a/src/lang/de.json b/src/lang/de.json
index 164dc25c..66de97ee 100644
--- a/src/lang/de.json
+++ b/src/lang/de.json
@@ -44,6 +44,13 @@
     "bonusDamage": "Zusätzlicher Schaden:",
     "buttonText": "Würfeln"
   },
+  "SPELL_DIALOG": {
+    "notReadyReason": {
+      "title": "Zauber kann aus folgenden Gründen nicht gewirkt werden:",
+      "noRepresentation": "Keine Repräsentation gewählt",
+      "tooManySpoMods": "Zu viele Spontane Modifikationen ausgewählt"
+    }
+  },
   "ITEM_BROWSER": {
     "progress": "{current}/{max}: Importiere von {compendium}"
   }
diff --git a/src/module/data/spomods/spoModData.mjs b/src/module/data/spellData/spellData.mjs
similarity index 76%
rename from src/module/data/spomods/spoModData.mjs
rename to src/module/data/spellData/spellData.mjs
index 66c4d199..5be5b2bc 100644
--- a/src/module/data/spomods/spoModData.mjs
+++ b/src/module/data/spellData/spellData.mjs
@@ -1,4 +1,24 @@
-const data = {
+export const leadingAttribute = {
+    "Alchimist": "KL",
+    "Borbaradianer": "KL",
+    "Druide": "KL",
+    "Geode (Herren der Erde)": "KL",
+    "Magier": "KL",
+    "Scharlatane": "KL",
+    "Zibilijas": "KL",
+    "Achaz": "IN",
+    "Derwisch": "IN",
+    "Durro-Dûn": "IN",
+    "Elfe": "IN",
+    "Ferkina": "IN",
+    "Geode (Diener Sumus)": "IN",
+    "Hexe": "IN",
+    "Schamane": "IN",
+    "Schelm": "IN",
+    "Zaubertänzer": "IN"
+}
+
+export const spoModData = {
 
     "Veränderte Technik": {
         name: "Veränderte Technik",
@@ -30,7 +50,7 @@ const data = {
     },
     "Erzwingen": {
         name: "Erzwingen",
-        description: "Verringert Erschwernis um 1 je doppelten AsP Punkt",
+        description: "Verringert Erschwernis um 1 je quadrierten AsP Punkt",
         mod: -1,
         castTimeMod: 1,
         castTimeMode: "Addition"
@@ -38,7 +58,7 @@ const data = {
     "Kosten einsparen": {
         name: "Kosten einsparen",
         description: "Reduziert die Kosten des Zaubers um 10% für jede zusätzlich aufgewendete Aktion",
-        mod: 3,
+        mod: -3,
         castingCosts: 0.1,
         castingCostsMode: "Multiply",
         castTimeMod: 1,
@@ -48,19 +68,17 @@ const data = {
     "Vergrößerung von Reichweite oder Wirkungsradius": {
         name: "Vergrößerung von Reichweite oder Wirkungsradius",
         description: "Vergrößert die Reichweite oder wenn möglich den Wirkungsradius auf kosten von Aktionen",
-        mod: 5,
+        mod: -5,
         castTimeMod: 1,
         castTimeMode: "Addition"
     },
     "Verkleinerung von Reichweite oder Wirkungsradius": {
         name: "Verkleinerung von Reichweite oder Wirkungsradius",
         description: "Verkleinert die Reichweite oder wenn möglich den Wirkungsradius auf kosten von Aktionen",
-        mod: 3,
+        mod: -3,
         castTimeMod: 1,
         castTimeMode: "Addition"
     },
 
 
-}
-
-export default data
\ No newline at end of file
+}
\ No newline at end of file
diff --git a/src/module/dialog/spellDialog.mjs b/src/module/dialog/spellDialog.mjs
index 5d03ffba..2228cc32 100644
--- a/src/module/dialog/spellDialog.mjs
+++ b/src/module/dialog/spellDialog.mjs
@@ -1,6 +1,6 @@
-import {Talent} from "../data/talent.mjs";
+
 import {ATTRIBUTE} from "../data/attribute.mjs";
-import SpoModData from "../data/spomods/spoModData.mjs";
+import {spoModData, leadingAttribute} from "../data/spellData/spellData.mjs";
 
 const {
     ApplicationV2,
@@ -50,6 +50,7 @@ export class SpellDialog extends HandlebarsApplicationMixin(ApplicationV2) {
     _variants = {}
     _costModel = {}
     _castTimeModel = {}
+    _spomods = {}
     displayModResult = 0
 
     constructor(actor, spellId) {
@@ -142,6 +143,8 @@ export class SpellDialog extends HandlebarsApplicationMixin(ApplicationV2) {
 
         })
 
+        this._spomods = foundry.utils.expandObject(formData.object)["spoMods"]
+
         this.render({parts: ["form"]})
     }
 
@@ -247,10 +250,11 @@ export class SpellDialog extends HandlebarsApplicationMixin(ApplicationV2) {
         context.text = this._spell.system.wirkung
         context.dice = []
         context.colorfulDice = game.settings.get('DSA_4-1', 'optional_colorfuldice')
-        context.modResult = this._spell.system.zfw - this.mod
+        context.modResult = this._spell.system.zfw + this.mod
         context.penalty = (this.mod > 0 ? "+" : "") + this.mod
         context.displayModResult = (context.modResult > 0 ? "+" : "") + context.modResult
         context.castingTime = this.#normalizeCastingTime(this._spell)
+        context.ready = true
 
         // variable probe (should consider Achaz as they can replace one KL in a KL/KL/* spell with IN
 
@@ -291,6 +295,9 @@ export class SpellDialog extends HandlebarsApplicationMixin(ApplicationV2) {
         Object.entries(this._spell.system.repräsentation).forEach(([key, value]) => {
             context.representationOptions[key] = key
         })
+        if (!this._selectedRepresentation) {
+            context.ready = false
+        }
 
         // Costs and Mutators
 
@@ -308,26 +315,70 @@ export class SpellDialog extends HandlebarsApplicationMixin(ApplicationV2) {
         }
 
         // SpoMods
+
+        context.spoModCount = Object.values(this._spomods).reduce((previousValue, currentValue) => previousValue + currentValue, 0)
+        context.maxSpoModCount = 0
+
+        if (this._selectedRepresentation) {
+            const leadingAttributKey = leadingAttribute[this._selectedRepresentation]
+
+            context.maxSpoModCount = (this._actor.system.attribute[leadingAttributKey.toLowerCase()].aktuell ?? 0) - 12
+            if (context.maxSpoModCount < 0) {
+                context.maxSpoModCount = 0
+            }
+        }
+
+        if (context.spoModCount > context.maxSpoModCount) {
+            context.ready = false
+        }
+
+        const mapper = (spoModName) => {
+
+            let data = spoModData[spoModName]
+            let value = this._spomods[data.name] ?? 0
+            let totalModValue = data.mod * value
+            return {
+                ...data,
+                value,
+                totalModValue
+            }
+        }
+
+
         context.spoMods = []
         if (this._spell.system.modifikationen) {
             this._spell.system.modifikationen.split(",").forEach(spoMod => {
 
                 switch (spoMod.trim()) {
                     case "Zauberdauer":
-                        context.spoMods.push(SpoModData["Halbierte Zauberdauer"])
-                        context.spoMods.push(SpoModData["Verdoppelte Zauberdauer"])
+                        context.spoMods.push(mapper("Halbierte Zauberdauer"))
+                        context.spoMods.push(mapper("Verdoppelte Zauberdauer"))
                         break;
                     case "Kosten":
-                        context.spoMods.push(SpoModData["Kosten einsparen"])
+                        context.spoMods.push(mapper("Kosten einsparen"))
                         break;
                     case "Reichweite":
-                        context.spoMods.push(SpoModData["Verkleinerung von Reichweite oder Wirkungsradius"])
-                        context.spoMods.push(SpoModData["Vergrößerung von Reichweite oder Wirkungsradius"])
+                        context.spoMods.push(mapper("Verkleinerung von Reichweite oder Wirkungsradius"))
+                        context.spoMods.push(mapper("Vergrößerung von Reichweite oder Wirkungsradius"))
                         break;
                 }
             })
         }
 
+        if (!context.ready) {
+
+            context.notReadyReasons = `<em>${game.i18n.format("SPELL_DIALOG.notReadyReason.title")}</em><ul>`
+
+
+            if (context.spoModCount > context.maxSpoModCount) {
+                context.notReadyReasons += `<li>${game.i18n.format("SPELL_DIALOG.notReadyReason.tooManySpoMods")}</li>`
+            }
+            if (!this._selectedRepresentation) {
+                context.notReadyReasons += `<li>${game.i18n.format("SPELL_DIALOG.notReadyReason.noRepresentation")}</li>`
+            }
+            context.notReadyReasons += "</ul>"
+        }
+
         return context
     }
 
diff --git a/src/style/organisms/_dialog.scss b/src/style/organisms/_dialog.scss
index c12deb44..18d2dd61 100644
--- a/src/style/organisms/_dialog.scss
+++ b/src/style/organisms/_dialog.scss
@@ -38,6 +38,15 @@
       .variant {
         display: grid;
         grid-template-columns: 80px 1fr;
+
+        input[type="number"] {
+
+          padding: 0;
+          margin: 0;
+          height: 21px;
+          max-width: 30px;
+
+        }
       }
     }
 
diff --git a/src/templates/dialog/spell-dialog.hbs b/src/templates/dialog/spell-dialog.hbs
index 50a3aab6..917f595b 100644
--- a/src/templates/dialog/spell-dialog.hbs
+++ b/src/templates/dialog/spell-dialog.hbs
@@ -52,14 +52,15 @@
 
     {{#if this.spoMods}}
         <fieldset class="scroll-y">
-            <legend>Spontane Modifikation</legend>
+            <legend>Spontane Modifikation {{#if this.spoModCount}}{{#if this.maxSpoModCount}}
+                [{{this.spoModCount}}/{{this.maxSpoModCount}}]{{/if}}{{/if}}</legend>
             <div class="variantList">
                 {{#each this.spoMods}}
                     <div class="variant" data-tooltip="{{{description}}}">
                         <div class="selection">
                             <label>
-                                <input type="checkbox" name="spoMods.{{name}}" {{checked variantChecked}}>
-                                {{#if (gte mod 0)}}+{{/if}}{{mod}}
+                                <input type="number" name="spoMods.{{name}}" value="{{value}}">
+                                <span>&times; {{#if (gte mod 0)}}+{{/if}}{{mod}}</span>
                             </label>
                         </div>
                         <div class="variantText">
@@ -104,7 +105,9 @@
     </fieldset>
 
 
-    <button class="actions" data-action="use"><i class="fa-solid fa-sparkles"></i> Zauber wirken {{#if modResult}}
+    <button class="actions" {{#if ready}}data-action="cast" {{else}}
+            data-tooltip="{{{notReadyReasons}}}" disabled="disabled" {{/if}}><i class="fa-solid fa-sparkles"></i> Zauber
+        wirken {{#if modResult}}
         [{{displayModResult}}]{{/if}}</button>
 
 </section>
\ No newline at end of file