Haytham Kenway is an amazing inclusion to our Knight Tribal serving many purposes. It acts like a Knight lord buffing our Knights with +2/2 while at the same time it acts as a target creature removal on ETB exiling up to one creature per opponent until it leaves the battlefield. The protection from Assassins is too specific to be taken count as protection in our deckbuilding Analysis but is a cool (and flavorful) bonus.
Sister of Silence gets cut because although it can be a useful protection tool, its ETB does not work well with Sidar Jabari of Zhalfir and it is quite expensive.
Now you can buy the upgrade cards with a click of a button!