Awakened Elder Berry

Whenever this transforms into Awakened Elder
Berry, reveal up to 20 cards from the top of your library. Place any Berries revealed this way onto
the battlefield, and put the rest back into your library, then shuffle.
At the beginning of combat, if you are attacking,
deal X damage to all other players, tap X
creatures opponents control, and give X creatures
you control indestructible and lifelink, where X
is the number of Berries you control.