Some of the Crystal version of the Magma Dragon look excellent, but not very coherent with the two other models. It would be a bit like if you made a Unicorn upgrade into Silver Unicorn / Nightmare - the Nightmare might look excellent, but it doesn't make any sense to group it with the Unicorns.
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What will happen now?
I think a ashy dark Magma/Lava wyrm with fire mixed with dark red crystals would be awesome but maybe your right.
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Over himself, over his own
body and
mind, the individual is
sovereign.
- John Stuart Mill