Vampire orchid

Vampire orchids were a type of plant found in the jungles that were the result of mutation generated by orchids in contact with the tetrahedron/metahedron. Charles Moore Wedderburn took care of several of the orchids in Shadowfell. They attacked Benny Summerfield and nearly drained all of her blood until the Seventh Doctor and Wedderburn saved her. (PROSE: Falls the Shadow)