Universe is isotropic and homogeneous at ≳ 100 Mpc length scales. It is desirable that present state of the Universe has no dependence on its initial geometry. In case of Bianchi Universes, i.e., anisotropic but homogeneous Universe, this has already been demonstrated via cosmological constant in a process that we call de Sitterization. In this paper, we show that for Bianchi Universe, the same state can be achieved by a homogeneous inflaton field with a general potential and satisfying a criterion, without needing cosmological constant. More importantly, we show that the same condition can constrain models of inflation and explain our idea with examples. Our results indicate that those model of inflation are favoured by observations which wipe out initial anisotropy.