1. Deploy Vashal Interceptor. 2. Deploy a couple of friendly champions around it. 3. Cast Invoke: Intercendence. 4. Attack affected champions. 5. They will be damaged and have effects applied to them. Solution: perhaps apply stacks of actual Zephyr Shield instead of a new condition. @Sokolov
Update: Invoke Intercendence's wind shield works ONLY if invoke triggers through Interceptor's health going below 50%. Manual Casts of Wind Shield don't work.