As a weapon:
* The knight charged into battle, his lance held high.
* The dragon slayer used his lance to pierce the beast's scales.
* The jousting tournament was a spectacle of skill, with knights breaking their lances against each other.
As a verb meaning "to pierce with a lance":
* The knight lanced the enemy's shield, shattering it.
* The jouster lanced his opponent's horse, sending it toppling.
* The warrior lanced through the air, aiming his weapon at the fleeing foe.
As a noun referring to a medical tool:
* The doctor used a lance to drain the boil.
* The patient needed a lance to remove the abscess.
* The lance was sterilized before being used on the wound.
As a noun referring to a part of a plant:
* The lance of the plant was sharp and pointed.
* The lance of the leaf was used to pierce the soil.
* The lance of the flower was a vibrant shade of purple.
Remember to choose the meaning of "lance" that fits the context of your sentence!