White Queen is great ally. Why? This card can really remove two statues in one turn (confuse or stun from hero and tough from villain by the attack). Also 2 thwart for basic ally is excellent and give a flexibility. What's more? Very good trait X-Men, and also not bad Psionic. Three points of life is a nothing crazy, but enough.
Rate (A-C) B+ Works well in solo/multiplayer, only downside is trait locked