Guild Wars 2

Tried to search but nothing happened when I typed in my query.

As titled,

When the Rock Dog from runes of the ogre or the Demon from the sigil of demon summoning die, neither are triggering the Death Nova trait, either damage blast or the poison field.

The sigil of superior demon summoning also fails to start counting charges again after the first demon summoned has died.

Thanks

As for your first issue;

Death Nova only works with Necromancer minions.

http://wiki.guildwars2.com/wiki/Minion