This kit's too dependent on your Q to work correctly. So far, we haven't really had what could be strictly classical monsters such as vampires (with Vladimir being a very close analogue). How 'bout we change a few things up and make 'ol Valika into a Vastaya and reduce their dependence on one ability?
Valika, the Vastayan Bloodstress
Passive: Flight -> At the 6:00 minute mark, you gain the ability to passively ignore all terrain.
Q-Blood Harvest: You channel a vector area cast (like Taric's E) dealing modest damage (based on AP), slowing opponents hit, and applying a debuff, Exsanguinated, for 4s. Dealing damage to exsanguinated enemies yields lifesteal equal to damage dealt.
W-Red Mist: You sacrifice some health to project yourself forward into a quickly moving cloud of blood, damaging enemies that you pass over and becoming invulnerable to crowd control and damaging abilities (it's similar to Kennan's W). Lingering on a enemies causes the damage to tick up over time. You also have to use more health the longer you linger in this form, with a portion being refunded based on damage dealt. (damage to enemies based on AP and health required based on rank).
E-Mesmerize: After a 0.5s windup you suppress all enemies champions in cone for 0.25/0.5/0.75/1/1.5s (based on rank).
R- Dark Intent- You focus your gaze on a single enemy champion, marking them for death. Being marked yields true sight for Xs (based on rank) and increases critical attack damage against this champion to 200%. If you or an ally fell a marked enemy, you are healed by X% (based on AP) and gain X permanent attack damage (based on rank).
Woowee. Happy New Year.