  We show that there exists a polynomial automorphism $f$ of $\mathbb{C}^{3}$
of degree 2 such that for every automorphism $g$ sufficiently close to $f$, $g$
admits a tangency between the stable and unstable laminations of some
hyperbolic set. As a consequence, for each $d \ge 2$, there exists an open set
of polynomial automorphisms of degree at most $d$ in which the automorphisms
having infinitely many sinks are dense. To prove these results, we give a
complex analogous to the notion of blender introduced by Bonatti and Diaz.
