Cardfight!! Vanguard: Legion Mate-hen

Cardfight Vanguard s4 and GX has a few things in common (mostly with s3) but the main reason to why I'm recommending s4 and not the first series is because s4 shares more similarities to GX s3. But the first season is also a good place to start off from if you want to understand s4 to the fullest and enjoy the Vanguard franchise/anime. In s3 of GX we get to witness the change of our main character Yuki Judai (Or Jayden if you watched the DUB) from this happy and enthusiastic to a stressed and depressed duelist (mostly from the sub) where his other self (the haou or supreme king) manifested and took over his body. (that was horrible wording OMG). And during s4 the main character Aichi turns cold and distant, acting unlike his cheerful and kind personality. These both changes in both main characters comes from them being overwhelmed with protecting someone/something that forced them to change and grow out of their old self into someone who can be strong and useful. Both's personality change comes from their will to protect their friends (even thought it's not too obvious from Judai) and seek justice. The people around them find their change unsettling (as Alexis and his friends would mention in s4) and all rather the old version of the main character than what they have changed into. Another point would be both animes are centered around card games and have magic involved in it. And both main character have special eyes that aid them in some sort of way while playing the game or not. (Aichi has PSYqualia and Judai has the Yubel and Supreme king eyes) Both have an evil phase If i were to say more about the similarities of both these amazing animes I would end up spoiling something, but I hope I have helped you in some sort of way to find something to watch!  read more