You've learned to use a lance in the most effective ways possible despite it's irregular design. You gain the following benefits:

• When you move more than 20 feet before taking the attack action, your attacks with lances this turn deal an additional 1d12 damage. 
• When you score a critical hit with a lance, the creature struck falls prone and drops anything it is holding
• Attacking creatures within 5 feet of you with a lance does not impose disadvantage