Altar of Shadows

Oracle Text

At the beginning of your precombat main phase, add B to your mana pool for each charge counter on Altar of Shadows.

7, T: Destroy target creature. Then put a charge counter on Altar of Shadows.

Card Rulings

10/4/2004 The precombat main phase is the first main phase of the turn. All others are postcombat main phases, even if they technically occur before combat.
12/1/2004 You put the counter on Altar of Shadows even if the creature regenerates.