The strategy that Russell used with his Maruading Captains reminded of the Yu-Gi-Oh GX Episode with Dark Magician Girl and Jaden dueling.
This a commonly known strategy in Warrior decks. Magician's Valkryia is the Spellcaster version, but she can't summon a Spellcaster of her own. Besides, she hasn't been released here yet.

Though I was suprised to see Russell summon Crescent Moon Queen.
Ditto, but it's a nice addition. CMQ is a great fanmade card.