By the power of truth, I, while living, have conquered the universe.
Nice, as a Yu-Gi-Oh player myself (many years ago) I was impressed. I'd suggest that the Master Chief card be like Exodia where you need the 5 pieces.
- Head of the Spartan
- Right Gauntlet of the Spartan
- Left Gauntlet of the Spartan
- Right leg of the Spartan
- Left leg of the Spartan
A Rtas 'Vadum ritual card would be awesome too.
Keep it up!