Fate NP: The Well of Mimir, Hidden Under Yggdrasil

The Well of Mimir, Hidden Under Yggdrasil is the Noble Phantasm belonging to Mimir Denis. It is the Well that is associated with Mimir, said to be located beneath Yggdrasil. Being the Master of the Well, Mimir can bring forth the Well anywhere he wishes.

It requires the True Name of Mimameior, The Tree of Mimir to be activated to use. The Well grants the drinker a huge boost of wisdom and knowledge from all realms. However should anyone wants to drink it has to fulfill a condition which is to sacrifice something for it.