Trygon

Trygons are basically super-raveners. Once upon a time, they were Gargantuan Creatures, but they've been downgraded to MCs with the 5th edition Tyranid Codex. Their gimmick is that they can deep strike onto the battlefield by tunneling, and can (under certain circumstances) allow other units to enter the board from their tunnels' exits. Trygons are equipped with four gigantic scything talons and a bioelectric field, which shoots lightning at their enemies. There is also a Synapse creature version, the Trygon Prime, which has a more powerful version of the bioelectric field biomorph.