Death root

{g}{g}{g}{g}{b}{b}{b}{b} summon two black green 2/2 death root tokens.
When death root is on the battlefield
copy it and put a +1/+1 counter on it.
{b/g}{g}{g}{g}{b}{b} put a poison, decay on target opponent, opponent losses 3 life on there end turn.But if death root dies all poison,
decay goes to.