Changes

Alastair was initially immune to [[Sam]]'s psychic abilities,<ref>[[4.09 I Know What You Did Last Summer]]</ref> although, ironically, he is eventually killed by them.<ref name="four16">[[4.16 On the Head of a Pin]]</ref> His durability seems to exceed that of most demons' as [[Ruby's knife]], a weapon that can kill demons, only greatly damage damaged him but did not kill without killing him.<ref>[[4.09 I Know What You Did Last Summer]]</ref><ref name="four16" />

As a torturer, he is an expert interrogator in that regard, ; according to [[Castiel]], he had an exceptionally strong will, allowing him to sustain himself while being tortured.<ref name="four16" /> [[Meg]] was an apprentice of him his before his death, giving her a similar strength when facing torture.<ref name="six10">[[6.10 Caged Heat]]</ref> He tortured both [[Dean]] and [[John Winchester]], and in both instances offered to end the torment if they would become torturers themselves. Alastair reveals that the first seal was broken when Dean accepted this offerafter thirty years of torture, although John resisted him for over a century.

He may also can be able to send an [[angel]] back to [[Heaven]] by expelling it from its [[vessel]](He was interrupted in doing so when h tried to perform that ritual, but his age suggests that this ability may simply not be well-known).<ref>[[4.10 Heaven and Hell]]</ref><ref name="four16" /> Alastair has shown to be resistant to an angel's power of [[exorcism]].<ref>[[4.10 Heaven and Hell]]</ref> He possess knowledge of the [[Four Horsemen of the Apocalypse]] and has demonstrated power to overwhelm a [[reaper]].<ref>[[4.15 Death Takes a Holiday]]</ref>