[Champion Concept] Mystique
Found this laying in my Google Drive from back in December 30th 2014 :)
"Thin built female glass cannon, melee and fast paced. Uses a thin sword that is always unsheathed, has a relationship that isn't defined with Yasuo. Ult teleports behind enemy champion and knocks back at the position where you were, any enemy champions that contact the knocked back target are knocked up for a short term duration. This champion will work well with champions such as Lee Sin and Yasuo. This champion is lifesteal orientated such as Fiora but has no dashes or escapes."
Q - Whirlwind (Active) 70 /90/110/130 mp Let's out a small whirlwind, champions that are hit are slowed by 30%/35%/45%/50% for 1/1.5/2/2.5 seconds dealing 50/100/150/200 base damage and 10%/15%/20%/25% AD CD: 8/6/5/4
W - Soul Purge (Active) No Cost Sacrifices half of current HP to gain 25%/30%/35%/40% lifesteal. Lasts 8 seconds. CD: 15/13/11/9
E - Mana Well (Active) 50/80/110/140 MP Channels HP into mana for 5 seconds. 20% to 5%/25% to 15%/ 30% to 25%/ 35% to 35%. HP to MP CD: 18/15/12/9
R - Repent (Active) 100/120/140 MP Teleports behind a champion and knocks them back to the position where you were. Enemy champions that come into contact with the target are knocked up for a short duration of time. 400/450/500 Units 200/300/400 Base Damage 15%/25%/35% AD CD: 150/130/110/90
Passive - Phase Champion gains movement speed 5% for every visible champion.
Champions focus will be on building lifesteal and quickly pinning down key targets. Using her ult she can easily catch out and punish the target. Mystique can make numerous plays and make game changing team fights occur.
Mystique will have great synergy with champions that can utilize her ult.
To counter Mystique you would need to shut her down before she builds attack speed and lifesteal. Thornmail and other defensive items would be very effective against her. She is vulnerable if she all-ins due to her lack of escapes.