In strand of the ancients a players Massive Seaforium Charge is usualy dropped on their death however if a death knight has shadow of death and uses explode before they die they will hold their Massive Seaforium Charge through death and the enemy will not be credited with killing someone carrying a Massive Seaforium Charge. Further more when the death knight rezzes he will not have the "carrying seaforium" buff and if the death knight is killed a second time while still carrying the same Massive Seaforium Charge the enemey will not be credited with killing someone carrying a Massive Seaforium Charge even if the death knight doesnt explode on the second kill.