Library ninjutsu ability can be activated only while you're searching your own library and only if you control at least one unblocked attacker
Then, if Shredder has dealt combat damage to a player, they lose half of their health, rounded up
It can shut down any of your opponents spells that let them take bonus turns, locking them out of any sort of combo shenanigans they might have up their sleeves
It doesn't enter first and then get its counters
Finally, it's obvious that Swords to Plowshares, Blasphemous Act, and Chaos Warp are staple Commander cards, and that is why they were included, but they feel sloppy, disconnected from theme, and thrown in as crowdpleasers
I'll join Gideon." Within seconds, she was gone