Black Winged Panoply

You place the skull of a raven or crow in front of you and toss a handful of ground-up coal into the air; the coal sparks with magic and is absorbed into the skull covering it with ancient runes and writing, enveloping your body in a dark shroud. Creating a set of dark see-through armor that resembles a bird, with a helmet in the shape of the skull. For 1 hour, you get an advantage on all strength and dexterity rolls until the spell dissipates or is dispelled.