The Homecoming Wiki needs to be updated. Someone edited it to add the "Vulnerability" inherent power, but accidentally deleted "Opportunity" from the inherent power section.
 
	 
 
	https://homecoming.wiki/wiki/Sentinel
 
	 
 
	https://homecoming.wiki/wiki/Opportunity
 
	 
 
	They must have misunderstood the patch notes. Sentinels now have two inherent powers, "Opportunity" and "Vulnerability".
 
	 
 
	Changes to Sentinel Inherent:
 
	Sentinels have an inherent resistance to Perception and ToHit debuffs (10%). 
	  * Opportunity builds automatically at a rate of 100% per minute. 
	  * Sentinels now have an inherent power called Vulnerability: 
	    * Vulnerability consumes 50% of your Opportunity to debuff a single target for 15 seconds. 
	    * Vulnerability is Auto-Hit and ignores level differences. 
	    * Vulnerability debuffs the following: 
	      * Damage Resistance 
	      * Defense 
	      * Mez Resistance 
	      * Stealth 
	  * Resistance to Endurance, Endurance Discount, Recovery, Regeneration, ToHit, and Recharge 
	  * Removed old Opportunity Debuff Effects/Modes from T1/T2 powers. 
	  * Removed old Inherent Proc. 
	  * Removed old Offensive/Defensive Opportunity Modes.