Ruadach, Elfhame of Llanowar

When Ruadach, Elfhame of Llanowar enters the
battlefield, create Terena, Queen of Ruadach, a
legendary 1/1 green and white Elf creature token
with "{g/w}, {t}: Target Elf creature you control
fights target creature you don't control."
Whenever an Elf enters the battlefield, untap
Ruadach, Elfhame of Llanowar.
{g/w}, {t}, Tap three untapped Elves you control:
Add {g}{g}{w}.