Complex sentence: Her gemstone is an amethyst, which is embedded in her chest, that she can use to summon an energy whip, and she can also charge at opponents with a "spin attack", which is very similar to how Sonic the Hedgehog can do it.
Split into simpler sentences: Her gemstone is an amethyst, which is embedded in her chest, that she can use to summon an energy whip. She can also charge at opponents with a "spin attack", which is very similar to how Sonic the Hedgehog can do it.