1. Join Cake Defence
2. Die
3. Open inventory and pick up bow with cursor
4. Keep the bow on your cursor until the Cake Defence round finishes
5. Wait for another round to start while the bow is still on your cursor
6. When the round starts, simply drop the bow into your inventory.
You now have a Cake Defence bow with Infinity X and Unbreaking X.

2014-01-14_05.59.57.jpg