OSRS Deadman Summer Invitational will begin, so the rules for has been posted, and you can learn them for death and skulling. And you also can buy cheap RS Gold to help you. Mmors.com will be a good choice for you.

No matter skulled or unskulled, if you are killed, which will let you lose 10 most worthwhile item stacks and all items on your possession.

If you are killed by a monster, you also will lost 10 most worthwhile item stacks and all items on your possession. But if you die to a monster while unskulled, you will only lose just as a normal death. You still can insure your HP level.