Smoldering Tar

Oracle Text

At the beginning of your upkeep, target player loses 1 life.

Sacrifice Smoldering Tar: Smoldering Tar deals 4 damage to target creature. Activate this ability only any time you could cast a sorcery.

Card Rulings

4/15/2013 If you cast this as normal during your main phase, it will enter the battlefield and you’ll receive priority. If no abilities trigger because of this, you can activate its ability immediately, before any other player has a chance to remove it from the battlefield.