Yuga and Luke vs Yuga Goha: A Yu-Gi-Oh Rush Duel

Why did they have to include Luke in this duel?

Ecdysis Caesarleon
[REQUIREMENT] None
[CONTINUOUS EFFECT] This card gains ATK equal to [the number of cards in your Graveyard] x 100.

Copyright Disclaimer Under Section 107 of the Copyright Act 1976, allowance is made for “fair use”, for purposes such as criticism comment, news reporting, teaching, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favor of fair use. All rights go to their respective owners.