The Wooden King
From Tardis Wiki, the free Doctor Who reference
The Wooden King was a being created from an Androzani tree. It grew from what looked like a Christmas tree bauble which Cyril Arwell had grabbed. Cyril followed the creature back to a copse of trees that had grown into a tower. When Madge Arwell was used as a lifeboat to save the trees' life force and travelled through the Time Vortex back to 1941, the Wooden King and Queen turned into ordinary wood. (TV: The Doctor, the Widow and the Wardrobe)
