HELP! Can you help me identify these lizards?

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I love these kinds of lizards I saw at the pet store a long time ago, and we might get one but I forgot what they are called Can you help me? They're big black lizards, with yellow spots, smaller than a foot long. Is that enough info :/ ? They're like JUMBO salamanders, like a huge Yellow Spotted Salamander but bigger and fatter. They live in mud or damp dirt.

Black w/ yellow spots
Smaller than 12 inches
JUMBO salamanders
Huge Yellow Spotted Salamander
Big
Fat
Live in mud or dirt