I'm playing a warlock in a D&D 5e campaign. I am playing a multiclassed Rogue 11/Warlock 1. For my one level in warlock, I chose the Raven Queen patron from Unearthed Arcana. According to the description for the Sentinel Raven feature:
You can see through the raven’s eyes and hear what it hears while it is within 100 feet of you.
Consider this example:
There is an enemy about 40 feet away, and there is a wall between us. I send my raven over the wall to recon, and I want to cast Hex on the enemy on the other side of the wall. The range for the Hex spell is 90 feet.
Am I able to cast Hex on this enemy given that he is within range of the spell and I can see him through my raven's eyes, even though there is a stone wall between us?
How does line of effect work with regard to casting spells at targets I can see through the raven's eyes?