- Missing spells after the recent patch
- The Violet Hold scenario asks me to Blink, but I don't have this spell
- My Demon Hunter doesn't have Sigil of Misery
If you are missing spells on your action bars, open your spell book (default button P), find the spell you are missing, and drag it to your action bar. You can also open your talents (default button N) and use the search field to find the spell you are looking for.
If you can't find the spell you are looking for in your spell book, try changing to a different talent specialization and then back again, as this should make the correct spells appear in your spell book.
Also note that some spells are replaced by others through talents, such as the shaman Lava Burst spell, which can be replaced with the Elemental Blast talent.