In regards to Dark Magician, there is a very big concern in regards to the second ability, with spells that either use more than 1 variable, don't use mana for one or more variables (and involve paying a non-mana cost for X), and that re-use the variable (spells costing XX or XXX) are all busted beyond words with it
If you control a "Mythological" monster, while this card is in the Graveyard: You can Special Summon this card
Pumpking the Great Ghost King Rank 6 DARK Zombie Xyz Effect Monster ATK/ 2400 DEF/ 2600 2 Level 6 Zombie monsters While you control "Call of the Haunted", your opponent cannot target Zombie monsters you control with monster effects
6 Droll And Lock Bird Limit Your Opponents Hand Size Droll and Lock Bird is an essential card to have in your Side Deck
Hailing from back in the day, Yubel is straight from Yu-Gi-Oh GX, my era, if you wanted to know
To me when I build RGT I want my Reasonings to resolve evenly so I opt for more variations in my monster star levels