From the Super Mario Wiki
Dark Magiblots are magic stain creatures that appear in Super Paper Mario. They only appear in rooms 85, 89 and 94 of the Flopside Pit of 100 Trials. They have twice the stats as a Yellow Magiblot. They wait, hidden in the ground, for potential prey to approach. Then, they rise out of the floor, only long enough to shoot magic blobs. They sink back into the floor, then repeat their attack. It is recommended to either reflect their attacks using Barry, or use an item or character that deals a high amount of damage, because if they are not defeated quickly, they can become quite a nuisance, since they appear in groups.
They are one of the most dangerous standard enemies in the game and are one of the most powerful statistically.
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