Ji Endo and DOTE are popular abbreviations that fans use when talking about this card, due to his initials and his Japanese pronounciation, which is written in kana instead of romanization of the word "the End".
Dragonic Overlord the End is the first Cross Ride shown in the anime, used by Toshiki Kai. It is later used by Katsumi Morikawa when Kai lent him his deck. It is shown again afterwards, this time used by Taishi Miwa as an attempt to unreverse Kai.
It could be noted anyone who used this card in Cardfight Vanguard!!(not G) (Kai, Morikawa, Miwa) actually lost fights using it.
In fact it's first (and only wins thus far), occur in Turn 6 of the GIRS Crisis Arc; the 250th Cardfight!! Vanguard episode released (meaning it took 193 episodes since it's reveal to actually win a game).