- "Ah, um, so the Lorian stabbed Jane with something called the Virgo Blade. And, uh, Rose vines grew from the wounds-- This seems to be the way grosser, less whimsical version of that. Um, this guy, Honeyclaw, he was taking care of Jane."
"Yeah. A-a talking bear."
"Honeyclaw said that the vines would keep growing and growing until they strangled her heart, um, but Jane survived."
- —Quentin Coldwater[src]
The Virgo Blade is a weapon that curses the victim and causes rose vines to grow from the wounds until they reach and strangle the heart of the victim.
The blade was given to Mike McCormick by the Beast in an attempt to kill Quentin, but was thwarted by Penny, who jumped in front of Quentin and was subsequently stabbed by Mike in the process. The curse was eventually lifted by sacrificing a wrapper from a chocolate bar that Kady had given Penny at Brakebills South.
Before being used by Mike, The blade made an appearance in the 5th Fillory book The Wandering Dune, where a Lorian assassin attacks Jane Chatwin. With the help of Honeyclaw, a talking bear, Jane was able to remove the curse by offering a doll her mother had given her as a sacrifice in place of her heart.
The blade, upon cutting, curses the wound, from which vines slowly grow out of, until they reach the heart of the victim, and strangles it to kill them.
It is possible to remove the curse by sacrificially burning the item that is the "most precious possession" to the victim.
- The curse embedded in the blade targets its victim's heart, but a loophole exists that allows one to survive at the cost of sacrificing their most prized possession in place of their heart.
- The creator of the Virgo Blade also made the Leo Blade.