Weight Spell

This enchantment causes the object on which is cast to hold "the weight of a thousand ages", making it unbearable for anyone. This spell doesn't have an immediate effect, but as to be telepathically activated by the witch or warlock.

Morgana used it on Arthur's sword, so that the King would have been defeated by Derian. Agravaine stole Arthur's sword and gave it to Morgana. She had prepared three piles of burning pieces of wood, placed to make the shape of a triangle. The sorceress knelt in the middle of it, and begun to chant these words: "Efencume ætgædre, eala gastas cræft ige. Hige hefe. Hefe mæst sara. Fornéðe þas, ende hie æra". As her eyes glowed gold, she held up the sword and its blade caught fire. She said: "Efencume þonne swæs bora". After a few seconds, the sword ceased to burn and Morgana gave it back to Agravaine, who secretly returned it to the King.

The next day, during Arthur and Derian's duel, Morgana focused her powers on the sword and activated the spell. Arthur was no longer able to wield it, and would have been killed if Merlin hadn't used his magic to stop Derian and save his friend (His Father's Son).