The gravity of the vocabulary is a caliber equal to Excalibur
Lu’s rhymes are as powerful as King Arthur’s fabled sword, Excalibur. Refers back to the line “The pen is mightier than the sword”.
Excalibur is the name of the legendary sword stuck in a stone that couldn’t be pulled out by anyone but the true king. (King arthur). Since it was so impossible to pull out, it’s the same as if the force of gravity was really strong with the sword.
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