It was just confirmed, there will be a class tree for sentinel in which if you hold down the super button activators, you will cast a ward of dawn like in D1. I don t have a link to the original source, but here s how i learned
https://youtu.be/FyHgyQpbw6Q
						
					
					
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	I like the idea that I thought was happening in the reveal demo. I thought the Titan had stood inside his bubble, and "absorbed it", turning it into the shield he started bashing people with
 
										 
					 
		    