The team tears into the vampire, Liselle's silversheen'd sword and Solstafir's axe cleaving through its body as Thanquil's arrows whistle through it, though rather than being damaged the creature bursts into (10d10)[55] bats! They flutter about the chamber, it seems they'll need a moment to orient themselves and reform the vampire.
Despite clearly appearing to hit, Solstafir and Liselle both didn't feel the tactile response of landing a blow on flesh.
The six clawed skeletons march their way towards you, passing through one another as if they weren't solid objects. They come upon the spider who is still standing as the group's vanguard and each attempt to claw it.
They only hit the spider on a 20:
(1d20)[3] to hit
(1d20)[10] to hit
(1d20)[5] to hit
(1d20)[19] to hit
(1d20)[13] to hit
(1d20)[13] to hit
Each one that hits deals (1d6+1)[6] slashing damage (before DR).
The party may act.