Sentinal is a thorn in our sides

[Molly_Millions]

except current Sentinel Description is wrong, you do nothing with your weapon.

That's besides the point, it increases your defenses without increasing enmity now. That can't be said of the new ability, therefore they are not the same. Using that similar ability in the same way we use sentinel now, may not produce the same results. In fact, I'd go so far as to say that doing so will probably backfire.