Overprotect Thats a lot of value on interaction, perfect for getting a big token or Commander through
It means Master will do great work in an Anowon, the Ruin ThiefAnowon, the Ruin Thief Rogue typal deck and it also buffs important creatures in your deck that don't actually have the Ninja creature type, like Slither BladeSlither Blade
You can also run it fairly, as a commander that provides both a mana advantage and card advantage since it effectively copies your instants and sorceries and gives you a discount
By letting it enter play without its coming into play text taking effect, you could sneak a 12/12 into play for a total of one mana for the Dreadnaught and two for the Mask
Maha, Its Feathers Night is definitely a powerful creature - the fact that it's a 6/5 flyer and trampler for just five mana is already aggressively costed, especially for Black
Saga even offers lifegain from Shadowspear, and additional Urza's Sagas via Expedition Map