Upgrade Metamorphosis

[EmeraldTiger]

I would like to see card ideas that change element or type when upgraded. I know this may be difficult to achieve. this is an out of the box concept, and I think it is one of the evolutions that cards ideas should take. Kamietsu made one in the polar series. I like the concept. Has anyone else attempted this?

Kamietsu +1 karma for innovative thinking.

[OldTrees]

The important distinction between Duo (Casting Cost and Activation cost are different elements) and Dual(Cards that change elements when upgraded) cards is the distinction between Mulitcolored and Hybrid cards in MTG.
Duo cards can use the sum of the two elements to draw their abilities from.
Dual cards can only use the intersection of the elements to draw their abilities from.

The best justification I can think of is when the upgrade (becoming more powerful) changes which element is appropriate.

A good luck card would start as increasing the randomness but skewing it toward your favor but upgraded it has better control and be able to reduce the randomness by eliminating some of the bad results.
So it would start as Entropy but upgrade into Gravity.

or

A consumption card would start as the biting and rending its foe and upgraded it would gain the Devour skill.
So it would start as Fire but upgrade into Gravity
or it would start with the Devour skill and upgrade into mass damage CC
So it would start as Gravity and upgrade into Fire.

[The_Mormegil]

I like this idea a lot, I will probably attempt some cards with this concept.

[Kamietsu]

I actually have a few cards like this. For one of the card competitions, I had a card that changed elements and somewhat changed ability. Didn't win, or get too many votes, if I recall correctly. And I'm not the first to come up with that upgrade idea, I'm sure. Not to mention, although unupped shard is basically usless, it does upgrade from a spell to a permanent, well, Shard of Gratitude that is.

[RootRanger]

I see nothing wrong with this, and we are already half way there.
Other to Entropy (Nova-Supernova)
Air to Other (Flying Weapon - Animate Weapon)

EDIT: While not technically other, they do not cost any quantum of a specific element.

[Glitch]

I am against this idea.  If the difference between an upgraded and an unupgraded card is too great, than decks will require that card to be upgraded, and suddenly it's more like you have two different cards, as it belongs in two different decks.  This is a lot like the pufferfish upgrade, which goes from water/air to more of a water/death card.