Of course, Lin Li knew very well that his Magic-forbidding Domain wouldn't be so effective if it was used against a real Elemental Wyrm or the Dragon of Dream. Or rather, the domain wouldn't have any effect. Although he was oppressed by the Elemental Wyrm's projected avatar since the start, he knew that it was just level-21 like himself.
It didn't mean that a person's level would definitely be high if his abilities were high. After all, personal level was just one factor. There were many other factors which affected one's abilities. For example, magical equipment, potions, scrolls, special techniques, and the Elemental Wyrm's projected avatar's endless mana and ability to release magic in a split second.