Luden's Echo 226655since 13.14.1 10 changes
2500g (2500g base, 1250g sell)
Fire: Damaging Abilities consume all the charges to deal an additional magic damage to the target and one additional nearby target per charge. If there are insufficient targets in range, for each remaining shot, repeat the damage on the primary target.
Builds into: 
Force of Arms
SpellDamageManaCooldownReductionAbilityHaste
Click any two patches to compare; the current range is shaded.
− (0s)Damaging Abilities fire 6 Shots that deal bonus magic damage to the target and nearby enemies. Remaining Shots fire on the primary target, dealing 35% damage.
+ Damaging Abilities fire 6 Shots that deal bonus magic damage to the target and nearby enemies. Remaining Shots fire on the primary target, dealing 35% damage.
− Damaging Abilities fire 6 Shots that deal bonus magic damage to the target and nearby enemies. Remaining Shots fire on the primary target, dealing 35% damage.
+ Damaging Abilities consume all the charges to deal an additional magic damage to the target and one additional nearby target per charge. If there are insufficient targets in range, for each remaining shot, repeat the damage on the primary target.