Thavra's Reckoning

The next time an opponent gains control of a permanent you control this turn, tap that permanent and all other permanents that share a type with it under that player's control. Thavra's Reckoning deals damage to that player equal to
the number of permanents tapped this way.
"There's no where left to run, witch. It's time you learned the true cost of indulging in your depraved obsessions."
- Bjeldor, to Thavra