Will-o'-the-Wisp ★★★★★

Flying (This creature can't be blocked except by creatures with flying or reach.)
: Regenerate Will-o'-the-Wisp. (The next time this creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)

"About, about in reel and rout The death-fires danced at night; The water, like a witch's oils, Burnt green, and blue and white." —Samuel Coleridge, "The Rime of the Ancient Mariner"