Extremal Black Holes with General Asymptotic Scalars in STU Supergravity and tests of Swampland conjectures.

We present a construction of the most general BPS black holes of STU supergravity (N=2 supersymmetric D=4 supergravity coupled to three vector super-multiplets) with arbitrary asymptotic values of the scalar fields. These solutions are obtained by acting with a subset of of the global symmetry generators on STU BPS black holes with zero values of the asymptotic scalars, both in the U-duality and the heterotic frame. The solutions are parameterized by fourteen parameters: four electric and four magnetic charges, and the asymptotic values of the six scalar fields. Furthermore, these solutions are used to study two swampland conjectures (Weak Gravity Conjecture and Swampland Distance Conjecture) in the moduli space of string compactifications.