Its nothing too crazy, especially compared with whats coming, but it's better than everything before it on the list
Then a massive 7 mana needs to be spent to level up again and this time you can force your foes to lose life equal to the lost life this turn in your end step, which I've never seen anyone get, but it's a double win con, card draw, and graveyard filling in one card, so it can play nicely in graveyard adjacent brews like reanimation and recursion, with the aforementioned Aristocrats and Sacrifice brews as well as in decks with a lot of flashback
At the start of my turn, its a new turn so Adaptive Shimmerer loses its summoning sickness
Ninjas Blades gives you what is essentially a free Yuriko trigger
To offset this downside, you can have a [c]Blood Artist[/c] in play, which make your opponents lose one life every time instead