Quote from Yatsufusa »
Well, as long as you have the mana, Navigator is already protection on its own (neither it nor Greaves will save them from a Wrath anyways). Not saying Greaves is bad (it's rarely ever bad to begin with, and can provide haste for the turn Etrata comes down), but the protection Greaves provides feels a bit overstated when Navigator is already involved. It still does save mana though.
This was all contingent on this guy coming into play this turn and wanting to attack with it immediately. Yes, the blink protection and having shroud with Greaves is a little redundant, it was mainly to give it haste. Not being touched by targeted removal is just icing at that point.