To create a book cover featuring Oliver with green eyes and blonde hair, you'll need a combination of illustration skills and design software. Here's a step-by-step guide to help you:

### Step 1: Concept Sketch
1. **Initial Sketch**:
   - Start with a rough sketch of Oliver. Focus on his key features: green eyes and blonde hair.
   - Position him in a dynamic pose, perhaps with his wand raised or interacting with a magical creature.
   - Sketch the background elements like the mystical forest, ancient castle, and magical symbols.

### Step 2: Detailed Illustration
2. **Character Details**:
   - Refine Oliver’s features. Ensure his green eyes and blonde hair are prominent.
   - Add details to his clothing, possibly a robe or outfit that suggests he’s a magical student.

3. **Background Details**:
   - Add intricate details to the mystical forest, like glowing orbs, enchanted trees, and distant castles.
   - Incorporate magical creatures like a phoenix or owl interacting with Oliver.

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