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Description

Here's Promethium Koopa, but in the dark. An example of when you turn off the light, the color of his wand changes from pink to green. As a lanthanide koopaling, his favourite element is also radioactive due to its instability.

Note: some radioactive elements of the periodic table are unstable.

Description

Here's Promethium Koopa, but in the dark. An example of when you turn off the light, the color of his wand changes from pink to green. As a lanthanide koopaling, his favourite element is also radioactive due to its instability.

Note: some radioactive elements of the periodic table are unstable.