Asymptotic Throat: The Geometric Inevitability of Regular Black Holes

We reveal that a fundamental minimal length naturally replaces the Schwarzschild singularity with future infinity, formalizing the ``asymptotic throat'' as a geometric inevitability. This scheme avoids the topology changes, multiple horizons, and universe towers characteristic of existing regular black hole models. We establish a general regularization framework, construct explicit examples with their physical sources, and show that the surface gravity and Hawking temperature remain unaltered. The asymptotic throat thus provides a pristine classical bedrock for future quantum gravity investigations.