Complex sentence: Season two introduces an Earth-2 version of Harrison Wells who created the metahumans of his world, denying it while creating metahuman detectors that put him in conflict with the Earth-2 version of the Flash, Jay Garrick.
Split into simpler sentences: Season two introduces an Earth-2 version of Harrison Wells. The Earth-2 version was also responsible for creating the metahumans of his world and refused to admit it, instead taking advantage of it by creating metahuman detectors, which put him in conflict with the Earth-2 version of the Flash, Jay Garrick.