Lets Talk about MF she is a very good auto attack damage dealer her ultimate just rapes all the people in team fight her ultimate hurts so does her double up
now i will tell you how to play this sxc lady ;) and her build

Greater Mark Of Desolation x9


Greater Glyph Of Alacrity


Greater Seal Of Fortitude


Greater Quint Of Desolation



These are good of this sxc MF because her normal attack plus "armour pen" is GG damage

Masteries are simple
21 for Offense
0 for Defense
9 for Utility

For Sxc MF I get these items

Berserker's Greaves


Blood Thirster


The Black Cleaver


Infinity Edge ( IE )


Phantom Dancer/Last Whisper/


Banshee's Veil / Frozen Mallet/

Flash (really needed)


Teleport



Ignite


Ghost

Strut - Passive
She can move faster if she is not getting damaged



Double Up - 1st skill Q
She hits the target she clicked on and hits another enemy behind
1/4/7/8/10



Impure Shots - 2nd skill W
She Attacks Faster If she Activates this skill And deals magic damage over time
2/5/9/12/13



Make it Rain - 3rd Skill E
She activates this skill on the location she targets and rain of bullets comes down in a circle slowing the enemy who is in the circle
3/14/15/17/18



Bullet Time - Ultimate R
She channels for 2 seconds sending out a cone of bullets dealing a tones of damage to enemies
Raise it when ever its avaliable 6/11/16

Thx guys ^^ hope you guys got lot of help vote and comment if you vote down ): please leave a comment why its bad and give me information if your vote up ! thats very good :D i will be pleased this is ParkComboGG. Bye bye (: !!!