Skrek, the headhunter

Bushido 2, First-Strike, Trophy
When Skrek, the headhunter dies, exile all trophies
in it with a skull counter in it, at the beggining of
your upkeep, if Skrek, the headhunter is in your
graveyard, you may create a Golden artifact token
for each creature card exiled with a skull counter in
it with:"Sacrifice, {t}:add one mana of any color to
your manapool", you lose life equal to the number
of treasures created this way