Complex sentence: The Spirits tried to trap him but he was to powerful, so the Wind Spirit, Enril, used up her power to create a whirlwind to trap him, but she was sucked into the Spirit Stone with Balsaar.
Split into simpler sentences: The Spirits tried to trap Balsaar but he was too powerful, so the Wind Spirit, Enril, used up her power to create a whirlwind to trap him. However, as a result of her weakened state, she was sucked into the Spirit Stone with Balsaar.