Jagged Shards.
This quest is started by getting Jagged Shard drop from Spiked Ghouls during quest Spill Their Blood. Problem is that quest cannot be accepted until the Spill Their Blood is handed in. That is very uncommon behaviour for this type of quest and I haven't found any evidence that the quest itself should be acceptable only after the player hands in STB quest.
It is also stated that once the first Sahrd drops, the drop chance is 100%, which is not the case on Mania.
https://www.wowhead.com/wotlk/item=43259/jagged-shard#comments:id=397544
Jagged Shards. This quest is started by getting Jagged Shard drop from Spiked Ghouls during quest Spill Their Blood. Problem is that quest cannot be accepted until the Spill Their Blood is handed in. That is very uncommon behaviour for this type of quest and I haven't found any evidence that the quest itself should be acceptable only after the player hands in STB quest. It is also stated that once the first Sahrd drops, the drop chance is 100%, which is not the case on Mania. https://www.wowhead.com/wotlk/item=43259/jagged-shard#comments:id=397544
https://wowpedia.fandom.com/wiki/Jagged_Shards#Notes: "A Jagged Shard will drop while killing ghouls during N [25-30] Spill Their Blood. Start the quest and keep killing." https://www.wowhead.com/wotlk/quest=13136/jagged-shards#comments:id=828095 broken English but I would say it suggest likewise "and you have get Spill Their Blood then the ghoul start drop
DROP IT WITH each time you kill one spike one"