Or in my (and Yuma's) case, XYZ summon.

Yuma: I shall now XYZ the monster that just appeared in my deck to turn this duel around!

Everyone who actually plays by the rules: Wait... you can't just add cards to your decks during the duel! That's illegal....

Back to the custom cards, I still kind of want Goliath to have 4000 attack. The main problem people had with Hercules is that his attack was too low for a level 10 (they even said his effect sucked), so I decided to create a new "boss" monster for the Steelswarms that was superior to him. I'll still be tweaking him before using him, that way I can come out with a boss monster that is better than Hercules but still fair to others.