Okay, let's try a slightly more appropriate enchantment.
Gladius Plus Ultra
Rego Terram 15 (Base 3, +2 metal manipulation, R: Personal, D: Concentration [+5 holds concentration], T: Individual)
A bronze shortsword, simple and solid in construction, with a hilt wrapped in gold wire. The name Gladius Plus Ultra is engraved along the flat of the blade. When the sword is wielded, it is inexorably bound to the wielder's hand until they willingly drop it. Any mundane attempt to disarm the sword results in it returning to the wielder's hand the very next turn. Due to its sigil, the Gladius is followed by the low rumble of thunder as it swings. The lab text includes the +3 bonus to Terram magic which bronze offers; copies of this text are available upon request to any Verditus magi.
This sword was a product of House Verditus' third generation of apprentices and their vendettas. Two apprentices sent champions to duel with magic swords, victory decided by disarm or surrender. The Gladius Plus Ultra is currently on display at Verdi, with a mummified severed arm still holding the hilt in a death grip.