A Deathclaw, nobody would mess with a guy wandering around with a Deathclaw. Wanna go into a restaurant with my Deathclaw? Awww he just wants a hug. Splat. Motherfucking Deathclaw. Deathhugs with Deathclaw
Or, one step further. Imagine the Tyranids kill some Deathclaws, process the genetic material and create new Tyranids which incorporate the Deathclaw. Then, one of the synapse creatures gets facehuggered and gives beautiful John Hurt stomach birth to a Deathclaw/Tyranid/Xenomorph. I want that as a pet.

Or, one step further. Imagine the Tyranids kill some Deathclaws, process the genetic material and create new Tyranids which incorporate the Deathclaw. Then, one of the synapse creatures gets facehuggered and gives beautiful John Hurt stomach birth to a Deathclaw/Tyranid/Xenomorph. I want that as a pet.