Liana, Lady of the Eclipse

Indestructible
As long as the amount of Legendary Creatures
on your side of the battlefield is less then 3,
Liana isn't a creature.
Your legendary creatures have +1/+1 and
Vigilance
While this is on the board, if you would summon
a Legendary creature while you have a legendary
creature on the battlefield, give the legendary
creature on the battlefield a +1/+1 counter.