  We present various 4d $\mathcal{N}=1$ theories enjoying IR global symmetry
enhancement. The models we consider have the $USp(2n)$ gauge group, 8
fundamental, one antisymmetric chirals and various numbers of gauge singlets.
By suitably turning on superpotential deformations involving the singlets which
break part of the UV symmetry we flow to SCFTs with $E_6$, $SO(10)$, $SO(9)$,
$SO(8)$ and $F_4$ IR global symmetry. We explain these patterns of symmetry
enhancement following two arguments due to Razamat, Sela and Zafrir. The first
one involves the study of the relations satisfied by marginal operators, while
the second one relies on the existence of self-duality frames.
