diff --git a/assets/extreme.png b/assets/extreme.png
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diff --git a/cogs/extremism.py b/cogs/extremism.py
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+++ b/cogs/extremism.py
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+# You have been warned - this file is very EXTREME!
+import discord
+import asyncio
+from functools import partial
+from discord.ext import commands
+import PIL.Image
+
+
+def overlay_logo(img: PIL.Image.Image) -> PIL.Image.Image:
+    """Overlay the logo on an image."""
+    logo = PIL.Image.open("assets/extreme.png", "RGBA")
+    logo = logo.resize((1024, 1024))
+    img = img.resize((1024, 1024))
+    # Use alpha overlay to merge the two
+    final = PIL.Image.new("RGBA", img.size)
+    final = Image.alpha_composite(final, img)
+    final = Image.alpha_composite(final, logo)
+    return final
+
+
+def overlay_purple(img: PIL.Image.Image) -> PIL.Image.Image:
+    """Overlay the purple on an image."""
+    # purple_overlay_rgb = 0x440099
+    purple_overlay_rgba = (68, 0, 153, 0.5)
+    # Create the overlay image
+    overlay = PIL.Image.new("RGBA", img.size, purple_overlay_rgba)
+
+    # resize to 1024x1024
+    img = img.resize((1024, 1024))
+    overlay = overlay.resize((1024, 1024))
+
+    # Use alpha overlay to merge the two
+    final = PIL.Image.new("RGBA", img.size)
+    final = Image.alpha_composite(final, img)
+    final = Image.alpha_composite(final, overlay)
+    return final
+
+
+def extremify(img: PIL.Image.Image) -> PIL.Image.Image:
+    """Apply the EXTREME effect to an image."""
+    img = overlay_logo(img)
+    img = overlay_purple(img)
+    return img
+
+
+class Extremism(commands.Cog):
+    def __init__(self, bot):
+        self.bot = bot
+    
+    @commands.slash_command(name="radicalise")
+    async def radicalise(self, ctx, image: discord.Attachment):
+        """Makes an image extremely radical."""
+        if not image.content_type.startswith("image/"):
+            await ctx.send("That's not an image!")
+            return
+        await ctx.defer()
+        # Download the image
+        _img_bytes = await image.read()
+        # Open the image
+        img = PIL.Image.open(io.BytesIO(_img_bytes), "RGBA")
+        # Apply the EXTREME effect
+        img = await asyncio.to_thread(extremify, img)
+        # Save the image
+        img_bytes = io.BytesIO()
+        img.save(img_bytes, format="PNG")
+        img_bytes.seek(0)
+        # Send the image
+        await ctx.respond(file=discord.File(img_bytes, filename="extreme.png"))
+
+
+def setup(bot):
+    bot.add_cog(Extremism(bot))