Yu-Gi-Oh! Duel Overlord Box Collector's Set
In the whole set there's 5 Spellcasters out of the 100 cards that are available. But, I wouldn't let that deter you from getting it. The set has a lot of good cards. And you get 30 Ultra Rare cards per box. It has cards for over 60 Archetypes, including Link Monsters for several older Archetypes and some previously manga exclusive cards. Over half the set is new to the TCG cards.
It's 1st Edition. You get 6 packs that each have 5 Ultra Rare cards, for a total of 30 cards, along with an oversized version of one of 6 cards with a manga inspired design.