User blog comment:Miskos3/Fairy Tail 514: Dragon Seed, Review/@comment-24784846-20161213010900/@comment-30338537-20161214100114

I think Irene uses Magic she directly learned from Belserion, but this is not actually DS Magic. Like others have said, she likely removed her own DS powers.

It was stated Belserion "counseled" her due to a certain predecessor having saved his life, so he may have taught her many powerful spells. This would explain why she's so strong, as many of her spells are learned from a powerful magical being. She did demonstrate Enchantment before she proposed the idea of Dragon Slayers to Belserion, so she was an Enchanter before becoming a DS and Dragons have been shown to know many different spells (stripping, memory manipulation, soul fusion, etc).

Wendy also knows some Enchantments and these were learned from Grandine, so my money is on Irene learning hers from Belserion. Besides, Wendy also knows some Enchantments which aren't DS Magic, like the speed and strength buffs, these don't carry any DS properties. Otherwise Wendy could've just buffed the Fiore army and/or the other Mages from GMG in order to have a DS Army that could fight the Eclipse Dagons. I think she buffed Mira, but Mira still didn't deal the same damage as Wendy's Roar eventhough Mira is clearly stronger.

I really doubt Irene's a Knowledge DS (what would she eat? puzzles? books? brains?). Imagine a Roar where she vomits brain tissue -_-, though it would be nice if she ate the books Mira and Sayla were throwing at eachother.

But I really like that Irene was a Queen 400 years ago. In ancient times it were usually the strong and gifted that became rulers, so her strength, talent and skill may be inherited from a superior bloodline. This would seem better than her and Erza being stong due to Dragons or Enchantments.