Tinybones, Abzan Explorer

Once per turn you can play a permanent from a graveyard that was milled there that turn. You
may spend mana as though it were mana of any
color to cast spells this way.
When Tinybones, Abzan Explorer deals combat
damage to an opponent that player mills a card.
{b}{g}, Mill a card: Return Tinybones from your graveyard to the battlefield tapped.