User blog comment:Kind-Hearted-One/Champion Descriptions: Let's do this/@comment-1920550-20150808024517

Sivir, the Battle Mistress is a mercenary marksmen whose primary strengths reside not in her damage, but in her supportive capabilities. Capable of boosting herself and her allies, Sivir stampedes through the battleground at breakneck speeds allowing her allies to either flank enemy teams, catch and dispose of isolated targets or even escape from ambushes. Despite her short range and average sustained damage, Sivir's incredible offensive area of effect spells allow her to shred entire teams or instantly clear waves of enemy minions allowing her to accelerate her acquisition of offensive items and quickly become an offensive threat.

This one i felt was necessary to mention Sivir's waveclear. While her lategame DPS isn't all that impressive, she has the best waveclear of any ADC, which helps her generate alot more gold than most ADC and in turn help her build items more quickly and stay "ahead of the curve" from her enemies most of the time.