FAQ:
Do temporary hit points from two applications of the
same effect stack? What about from different effects? If I
have temporary hit points from multiple sources, how
should I apply damage?
Temporary hit points from two applications of the same
effect don’t stack; instead, the highest number of temporary hit
points applies in place of all others. Temporary hit points from
different sources stack, but you must keep track of them
separately.For example, imagine a character who gained 15 temporary
hit points from an aid spell. After taking 8 points of damage,
she has 7 temporary hit points left from the spell. If another aid
spell were cast on the same character granting 12 temporary hit
points, this total would replace the other spell’s total, meaning
the character would now have 12 temporary hit points (rather
than 19). If the character then cast false life on herself, she
would add the full benefit of that spell to the temporary hit
points from the aid spell.
This also applies to temporary hit points gained from
energy drain and similar special abilities. Each successful
attack counts as one application of the effect (meaning that an
attack that bestows 2 or more negative levels still counts as
only one application of the effect). For example, a wight gains
5 temporary hit points each time it bestows a negative level
with its slam attack. If it bestows another negative level while it
has 2 temporary hit points remaining from the first attack, the
new temporary hit points would replace the old ones.Temporary hit points are “first-in, first-out.” Damage
should be taken off the oldest temporary-hit-point-granting
effect first; when that effect is exhausted, apply damage to the
next oldest effect. For this reason, you must track each supply
of temporary hit points separately.
很明显是设计怪物的人当初根本没有想到这点.
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