I took Terry becoming the Morrigan as her basically dying. How else does someone become a death goddess? She essentially sold her soul on that too. There’s no way the Morrigan would just let her go and certainly not just to hang out on Krakoa. So I think the Siryn we saw from the very beginning on Krakoa was one created by the resurrection process. However, the amortiguan doesn’t want new Terry’s created because she agreed to essentially due to become the Morrigan and heal Lorna’s mind.