Herald of Cataclysms

{u}:Put a rain counter on Herald of Cataclysms.
{b}:Put a rot counter on Herald of Cataclysms.
{r}: Put a bolt counter on Herald of Cataclysms.
{g}:Put a dirt counter on Herald of Cataclysms.
When Herald of Cataclysms leaves play; for every rain counter on it have a player mill 2, for every rot counter all creatures get a -1/-1 counter, for every bolt counter each player loses 3 life, and for every dirt counter return a card from your graveyard to your hand.