diff --git a/.idea/workspace.xml b/.idea/workspace.xml
index 5c10968..d8e1213 100644
--- a/.idea/workspace.xml
+++ b/.idea/workspace.xml
@@ -1,14 +1,41 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <project version="4">
+  <component name="BranchesTreeState">
+    <expand>
+      <path>
+        <item name="ROOT" type="e8cecc67:BranchNodeDescriptor" />
+        <item name="LOCAL_ROOT" type="e8cecc67:BranchNodeDescriptor" />
+      </path>
+      <path>
+        <item name="ROOT" type="e8cecc67:BranchNodeDescriptor" />
+        <item name="REMOTE_ROOT" type="e8cecc67:BranchNodeDescriptor" />
+      </path>
+      <path>
+        <item name="ROOT" type="e8cecc67:BranchNodeDescriptor" />
+        <item name="REMOTE_ROOT" type="e8cecc67:BranchNodeDescriptor" />
+        <item name="GROUP_NODE:origin" type="e8cecc67:BranchNodeDescriptor" />
+      </path>
+    </expand>
+    <select />
+  </component>
   <component name="ChangeListManager">
     <list default="true" id="5a564ebd-fc70-42c4-839e-ada1568e38a3" name="Default Changelist" comment="">
-      <change afterPath="$PROJECT_DIR$/royalspells/__init__.py" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/royalspells/mixins.py" afterDir="false" />
+      <change afterPath="$PROJECT_DIR$/royalspells/spells.py" afterDir="false" />
+      <change beforePath="$PROJECT_DIR$/.idea/workspace.xml" beforeDir="false" afterPath="$PROJECT_DIR$/.idea/workspace.xml" afterDir="false" />
     </list>
     <option name="SHOW_DIALOG" value="false" />
     <option name="HIGHLIGHT_CONFLICTS" value="true" />
     <option name="HIGHLIGHT_NON_ACTIVE_CHANGELIST" value="false" />
     <option name="LAST_RESOLUTION" value="IGNORE" />
   </component>
+  <component name="FileTemplateManagerImpl">
+    <option name="RECENT_TEMPLATES">
+      <list>
+        <option value="Python Script" />
+      </list>
+    </option>
+  </component>
   <component name="Git.Settings">
     <option name="RECENT_GIT_ROOT_PATH" value="$PROJECT_DIR$" />
   </component>
@@ -22,6 +49,12 @@
     <property name="RunOnceActivity.OpenProjectViewOnStart" value="true" />
     <property name="WebServerToolWindowFactoryState" value="false" />
     <property name="last_opened_file_path" value="$USER_HOME$/Code" />
+    <property name="node.js.detected.package.eslint" value="true" />
+    <property name="node.js.detected.package.tslint" value="true" />
+    <property name="node.js.path.for.package.eslint" value="project" />
+    <property name="node.js.path.for.package.tslint" value="project" />
+    <property name="node.js.selected.package.eslint" value="(autodetect)" />
+    <property name="node.js.selected.package.tslint" value="(autodetect)" />
     <property name="settings.editor.selected.configurable" value="reference.settingsdialog.IDE.editor.colors" />
   </component>
   <component name="SpellCheckerSettings" RuntimeDictionaries="0" Folders="0" CustomDictionaries="0" DefaultDictionary="application-level" UseSingleDictionary="true" transferred="true" />
@@ -32,8 +65,16 @@
       <option name="number" value="Default" />
       <option name="presentableId" value="Default" />
       <updated>1600037431143</updated>
-      <workItem from="1600037432337" duration="336000" />
+      <workItem from="1600037432337" duration="5980000" />
     </task>
+    <task id="LOCAL-00001" summary="1️⃣ First 4.0 commit">
+      <created>1600037920485</created>
+      <option name="number" value="00001" />
+      <option name="presentableId" value="LOCAL-00001" />
+      <option name="project" value="LOCAL" />
+      <updated>1600037920485</updated>
+    </task>
+    <option name="localTasksCounter" value="2" />
     <servers />
   </component>
   <component name="TypeScriptGeneratedFilesManager">
@@ -50,4 +91,14 @@
       </map>
     </option>
   </component>
+  <component name="VcsManagerConfiguration">
+    <MESSAGE value="1️⃣ First 4.0 commit" />
+    <option name="LAST_COMMIT_MESSAGE" value="1️⃣ First 4.0 commit" />
+  </component>
+  <component name="WindowStateProjectService">
+    <state x="1840" y="278" key="Vcs.Push.Dialog.v2" timestamp="1600037924417">
+      <screen x="1280" y="0" width="1920" height="1080" />
+    </state>
+    <state x="1840" y="278" key="Vcs.Push.Dialog.v2/1280.0.1920.1080/3200.0.1280.1024/0.32.1280.992@1280.0.1920.1080" timestamp="1600037924417" />
+  </component>
 </project>
\ No newline at end of file
diff --git a/royalspells/mixins.py b/royalspells/mixins.py
new file mode 100644
index 0000000..6e36952
--- /dev/null
+++ b/royalspells/mixins.py
@@ -0,0 +1,14 @@
+from typing import *
+import random
+
+
+class SeededMixin:
+    def __init__(self, seed: Hashable, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.rand = random.Random(hash(seed))
+
+
+class RandomMixin:
+    def __init__(self, rand: random.Random, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.rand = rand
diff --git a/royalspells/spells.py b/royalspells/spells.py
new file mode 100644
index 0000000..4ef87b6
--- /dev/null
+++ b/royalspells/spells.py
@@ -0,0 +1,127 @@
+from typing import *
+import math
+import enum
+import abc
+
+from .mixins import *
+
+
+class Spell(SeededMixin):
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        self.effects: List[Effect] = [...]
+        self.cost = ...
+
+
+class Effect(RandomMixin):
+    """A single consequence of a spell."""
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        self.target: Target = Target.select(self.rand)
+        """The :class:`Target` of the effect."""
+
+        self.damage: Optional[Damage] = ...
+        """The :class:`Damage` of the effect, or :const:`None` if it doesn't do any damage."""
+
+        self.healing = ...
+        self.buffs = ...
+        self.attributes = ...
+
+
+class Target(enum.Enum):
+    """A target for a spell."""
+
+    RANDOM_ENEMY = enum.auto()
+    ALL_ENEMIES = enum.auto()
+    RANDOM_ALLY = enum.auto()
+    ALL_ALLIES = enum.auto()
+    RANDOM_CREATURE = enum.auto()
+    ALL_CREATURES = enum.auto()
+    USELESS_THING = enum.auto()
+
+    @classmethod
+    def select(cls, seed: random.Random):
+        """Pick a target using the default distribution."""
+
+        result = seed.randrange(1, 101)
+        """A number from 1 to 100, determining the chosen target."""
+
+        # 50%: RANDOM_ENEMY
+        if result <= 50:
+            return Target.RANDOM_ENEMY
+        # 20%: ALL_ENEMIES
+        elif result <= 70:
+            return Target.ALL_ENEMIES
+        # 15%: RANDOM_ALLY
+        elif result <= 85:
+            return Target.RANDOM_ALLY
+        # 5%: ALL_ALLIES
+        elif result <= 90:
+            return Target.ALL_ALLIES
+        # 5%: RANDOM_CREATURE
+        elif result <= 95:
+            return Target.RANDOM_CREATURE
+        # 3%: ALL_CREATURES
+        elif result <= 98:
+            return Target.ALL_CREATURES
+        # 2%: USELESS_THING
+        else:
+            return Target.USELESS_THING
+
+
+class Damage(RandomMixin, metaclass=abc.ABCMeta):
+    """The damage of a spell effect. Should be extended, implementing its methods.
+
+    Examples:
+        See :class:`UniformDamage`, :class:`NormalDamage` and :class:`FixedDamage`."""
+
+    @abc.abstractmethod
+    def select(self, rand: random.Random) -> int:
+        """Calculate the damage of the spell. It should always return a non-negative :class:`int`.
+
+        Note:
+            It uses a separate RNG than the one passed to the damage class!"""
+        raise NotImplementedError()
+
+
+class UniformDamage(Damage):
+    """The damage of a spell effect, following a gaussian distribution."""
+
+    def __init__(self, min_: float, max_: float, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.min: float = min_
+        self.max: float = max_
+
+    def select(self, rand: random.Random) -> int:
+        n = self.rand.uniform(self.min, self.max)
+        n = math.ceil(n)
+        return n
+
+
+class NormalDamage(Damage):
+    """The damage of a spell effect, following a gaussian distribution."""
+
+    def __init__(self, mu: float, sigma: float, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.mu: float = mu
+        self.sigma: float = sigma
+
+    def select(self, rand: random.Random) -> int:
+        n = self.rand.gauss(self.mu, self.sigma)
+        n = n if n > 0 else 0
+        n = math.ceil(n)
+        return n
+
+
+class FixedDamage(Damage):
+    """The damage of a spell effect, which is always constant."""
+
+    def __init__(self, value: int, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+        self.value = value
+
+    def select(self, rand: random.Random) -> int:
+        return self.value