Dagon, The Deep One

While Dagon enter in the battlefield creates
an artifact token called Monolith of Nightmares.
"Vast, Polyphemus-like, and loathsome, it darted
like a stupendous monster of nightmares to the
monolith, about which it flung its gigantic scaly arms,
the while it bowed its hideous head and gave vent to certain measured sounds."