To get Op Items you need make is
1. The OP items are legendary
2. The OP Items are only in boxes
3. Boxes can boughted or getted from levels
4. The easy way is go to Overlord Den 8
5. Win the level, you get a probability of get a special box
6. If you no get a box, try again and again until you get the special box from the level
7. Pray for get good luck in the box or make a Pact with supermechs gods to get good luck in boxes
8. If you no get the legendary, try again the level until your body falls for try it too much or your drain all your energy
9. End