The Symmetrical Lance is a spear-like meleeweapon, which makes all hits critical for six seconds after rapidly killing two enemies.
Killing enemies quickly with this weapon is the best way to maximize its damage. However, the area of effect of the attack is a very narrow horizontal line so you will find it quite difficult to hit bat-like enemies and those slightly below or above you. It does hit slightly behind you as well.
Details
Special Effects:
If the player kills 2 enemies within 1.5 seconds of each other with this weapon, all subsequent attacks deal 1.5x damage (251 base critical DPS) for 6 seconds.
The first hit of the combo deals weak knockback while the final hit deals somewhat strong knockback. The second swing also hits enemies behind you.