Across the Heavens, Starting by Summoning Myself

A terminal illness, with only 48 hours left to live? I awaken the SSS-rank unique talent [Time-Space Unity] and summon myself from parallel universes! In the wasteland, I wield a bone blade. In the cultivation world, I soar through the heavens on my sword. In the mechanical world... If I so choose, all my selves across countless lives can become one! But every summon drains my life force. When that girl burns through her lifespan to save me and her hair turns white, I swear: Across the Myriad Worlds, I won’t just survive. I’ll live on my feet!