Undyne, Undying Protector

Vigilance, Double Strike, Trample, Indestructible, Haste
Undyne, Undying Protector gets +1/+1 for each creature in your graveyard and on the battlefield.
No other creatures can attack if Undyne, Undying Protector attacks.
"You're gonna have to try a little harder than that."
(Transformed from Undyne, Guard Captain.)