PIERCES SPELL IMMUNITY:No
Hurls a poisoned dagger which deals large initial damage, and then deals damage over time. The poisoned unit has its movement speed slowed for  seconds. An instance of damage is dealt every 3.0 seconds.
The affected unit slowly regains its original movement speed every second during the duration.
Units afflicted by Shadow Strike can be denied by their allies when their HP drops below 25% of their maximum health.