Dagon

Islandwalk, Menace, Flash
When Dagon enters the battlefield under your control, destroy target attacking creature.
—
then I saw it. The thing slid into view above the dark waters. Vast, 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.
I think I went mad then.
Dagon—H. P. Lovecraft