What does the tombstone perk do in black ops 2 do?

Answer 1

Tombstone is a new Perk-A-Cola in Zombies. Each use costs 2000 Points. This perk drops a tombstone wherever you may have died, preserving the last weapons you held. Once you come back to life in the next round, you can grab your weapons from the tombstone.

Answer 2

if you are playing multiplayer and have this perk when you die you drop a tomb stone when you come back the next round you go to your tombstone and recieve your perks and weapons back but you must do it the round you spawn and you must buy tombstone again. This does not work if you get revived and im not sure about solo