Talk:Game Updates/@comment-49.50.204.92-20120716041330/@comment-60.240.68.239-20120716200952

Here's my appraisal of the breeding-for-profit potential for these three dragons.

Magnetic dragon: takes 8 hours total (4 hours per stage) and sells for 1,150,000 DC.
 * Can only be reliably bred by Magnetic+Magnetic, due to Copper having the same elements.
 * Lives in the low-cash Lightning habitat or the high-capacity Metal habitat.

Iron dragon: takes 8 hours total (4 hours per stage) and sells for 1,150,000 DC.
 * Can be bred by Iron+Iron, Earth+Iron, Metal+Iron or Earth+Metal.
 * Both the habitats it lives in have high cash capacity, but Iron earns fewer coins per minute than Magnetic.

Gold dragon: takes 96 hours total (48 hours per stage) and sells for 5,000,000 DC.
 * Can only be reliably bred by Gold+Gold. Takes 12 times longer than Iron or Magnetic.
 * Lives in a very high capacity habitat. Earns far more coins per minute than Iron or Magnetic.

Verdict:
 * Iron is the best earner if your Magnetic dragons live in a Metal habitat.
 * Magnetic is the best earner if your Magnetic dragons live in a Lightning habitat.
 * Gold is the best earner if you only visit your dragon park once a day.