D&D 4E 4e ask a simple question, get a simple answer

[MwaO]

Mummy Rot is now defined as this, as a level 21 disease.

Check: At the end of each extended rest, the target makes an Endurance check if it is at stage 1 or 2.
9 + two-thirds mummy's level or lower: The stage of the disease increases by one.
10 + two-thirds mummy's level-14 + two-thirds mummy's level: No Change
15 + two-thirds mummy's level or higher: The stage of the disease decreases by one.

So...2/3rds of 28 = 18, the DC is 27 to fail to stop the change of the disease. At 26th level, a PC who started with a 12 Con, untrained in Endurance is going to have the following Endurance check: 10+2(Con leveled to 14 for being an 11/21st level PC)+13(half level). i.e. +25 Endurance.

Basically, given PCs can assist with checks and the Endurance specialist or Heal specialist can auto-pass a +2 bonus for aiding, there should be no chance of advancement at DC 27. This isn't even including that there's a saving throw for contracting diseases. So Mummy Rot might hang around for a day or two on a near-God PC, but it eventually goes away.

 

[G'lich]

Thanks for respond:

Lvl 28 mummy rot

9 + two-thirds mummy's level or lower: The stage of the disease increases by one. = 9 + 18 = 27- DC (increase disease)
10 + two-thirds mummy's level-14 + two-thirds mummy's level: No Change = 10 + 18 / 14 + 18 = 28 to 32 DC (no change)
15 + two-thirds mummy's level or higher: The stage of the disease decreases by one. = 15 + 18 = 33+ DC (decrease disease)

There is no saving throw from disease, if attack is hit, creature has disease.
Check is made on the end of each extended rest.
So, the total result of d20 + Endurance Skill should be 33(+) to decrease the disease, while 27(-) increase disease.
Example: PC lvl 26 (half/lvl is 13), untrained in Endurance, with Con 14 (Con mod +2).. (half/lvl) 13 + (con mod) 2 = 15 Endurance Skill (without any assist).. The roll of 18 is needed to pass DC 33 and decrease disease by 1 (or remove disease if disease is on stage 1 at the moment).. While roll of 12 or lower increase disease stage by 1 and can lead to death on stage 3..