Ridoria, Fallen Bookkeeper

If a Fallen creature in your graveyard has
First Strike, Ridoria, Fallen Bookkeeper has
First Strike, the same is true of Double Strike,
Flying, Deathtouch, Haste, Hexproof, Indestructible, Lifelink, Menace, Reach, Skulk, Trample, Vigilance, Undying, and Shadow.
When keeping records, you learn everyone's secrets.