Blizzard is investigating an issue with Resplendent Sparks on the Eternal Realms.
If you have any Resplendent Sparks in your inventory, a bug from the Season 4 patch is preventing you from seeing them. Blizzard is aware of the issue and is working on a hotfix.
We are currently investigating an issue with Resplendent Sparks on the Eternal Realm. Players may not see any Resplendent Sparks in their inventory despite having them prior to the start of Season 4. We are investigating the issue and we will provide an update for all players once we have one. Thanks for your patience!