Trial of the Gom Jabbar

At the beginning of your upkeep, put a pain counter on Trial of the Gom Jabbar. Then each opponent chooses Human or Inhuman.
Human—You lose one life for each pain counter on Trial of the Gom Jabbar.
Inhuman—Discard cards equal to the number of pain counters on Trial of the Gom Jabbar plus one. Exile Trial of the Gom Jabbar.