Polymorph不能获得special qualities，所以变龙也无法免电。
任何Con变化都会对HP造成影响，所以Con高了HP自然也会提高。
此外，如果是认为随Con增加而提高的HP只是上限的话，从PHB 146页“Increases in Constitution Score and Current Hit Points”段落的例子可以看出，Con提高后上限HP和实际HP都会增加，并非只提高上限。
这样说就错
关于法术Polymorph
This spell functions like
alter self, except that you change the willing subject into another form of living creature. The new form may be of the same type as the subject or any of the following types: aberration, animal, dragon, fey, giant, humanoid, magical beast, monstrous humanoid, ooze, plant, or vermin. The assumed form can’t have more Hit Dice than your caster level (or the subject’s HD, whichever is lower), to a maximum of 15 HD at 15th level. You can’t cause a subject to assume a form smaller than Fine, nor can you cause a subject to assume an incorporeal or gaseous form. The subject’s creature type and subtype (if any) change to match the new form.
关于法术alter self
You retain your own ability scores.
Your class and level, hit points, alignment, base attack bonus, and base save bonuses all remain the same. You retain all supernatural and spell-like special attacks and qualities of your normal form, except for those requiring a body part that the new form does not have (such as a mouth for a breath weapon or eyes for a gaze attack).
变身类法术或能力几乎都是（没仔细查过是否有例外）换壳不换内容。身体属性提高能改变战斗能力或者豁免，但是内在数据（class level, hp,bab等）不会跟着变
