  The largest structures in the cosmic web probe the dynamical nature of dark
energy through their integrated Sachs-Wolfe imprints. In the strength of the
signal, typical cosmic voids have shown good consistency with expectation
$A_{\rm ISW}=\Delta T^{\rm data} / \Delta T^{\rm theory}=1$, given the
substantial cosmic variance. Discordantly, large-scale hills in the
gravitational potential, or supervoids, have shown excess signals. In this
study, we mapped out 87 new supervoids in the total 5000 deg$^2$ footprint of
the Dark Energy Survey at $0.2<z<0.9$ to probe these anomalous claims. We found
an excess imprinted profile with $ A_{\rm ISW}\approx4.1\pm2.0$ amplitude. The
combination with independent BOSS data reveals an ISW imprint of supervoids at
the $3.3\sigma$ significance level with an enhanced $A_{\rm
ISW}\approx5.2\pm1.6$ amplitude. The tension with $\Lambda$CDM predictions is
equivalent to $2.6\sigma$ and remains unexplained.
