White Zetsu Army

When this card enters the battlefield, summon 5 1/1 White Zetsu tokens.
As long as White Zetsu Army is in play, all tokens you control become White Zetsu tokens.
White Zetsu Army gains +1/+1 for each token you control.
White Zetsu Army gains trample if you control 4 or more tokens.
Sacrifice a White Zetsu token: White Zetsu Army gains indestructible until the end of the turn.