What Upgraded Cards are the Best Compared to Their Unupped Version?

[Demagog]

Exactly what the title says. Which cards become much more usable when upgraded? This isn't about anything being the best upgraded card, it's about the difference between the upgraded version of cards and the regular version.

[Essence]

Arctic Dragon.
Abyss Crawler.
Trident.  (That extra makes a HUGE difference!)


That's the side of things, anyway.

[Demagog]

Ya I noticed earlier that arctic dragon gets a huge boost for only 1 extra quanta, and can't be denied by gravity shield either. If I had had the funds at the time I'd have upgraded the ones I was using for the tournament.

[Arondight]

Phoenix and Minor Phoenix for one thing.

[Retribution]

Flesh Spider ----> Flesh Recluse
Blue Crawler ----> Abyss Crawler
Colossus Dragon -----> Massive Dragon
Miracle ----> Improved Miracle
Ice Dragon ----> Arctic Dragon
Azure Dragon ----> Sky Dragon
Owl's Eye ----> Eagle's Eye

[teffy]

Flying Weapon        <-> Animate Weapon
Otyugh                  <-> Elite Otyugh
Golden Hourglass <-> Electrum Hourglass
Pulverizer
Guardian Angel       <-> Archangel
Miracle                   <-> Improved Miracle
Purify                     <-> Purify

[Retribution]

Flying Weapon        <-> Animate Weapon
Otyugh                  <-> Elite Otyugh
Electrum Hourglass <-> Golden Hourglass
Pulverizer
Guardian Angel       <-> Archangel
Miracle                   <-> Improved Miracle
Purify                     <-> Purify

Electrum Hourglass is the upgrade of golden hourglass, non?

[teffy]

Ups

[Malduk]

I started making a list, but then I figured its useless
There are lots of cards that double their effectiveness (or half their cost) in upgraded version. But yeah, there are lots of cards that are barely different in upgraded and unupped version.

It is hard to draw a line and say which are really the best ones. But if I had to pick, I'd say:

- Cards that spend random quanta or are free in upped version. They suddenly become usable by any element, and that itself is a huge thing.
- Shards for obvious reasons
- Anything that generates quanta upgraded. Again, obvious reasons. Nevermind that those cards usually suck, upgrade makes a big difference.
- Supernova! Best quanta generator in the game for rainbow decks.

As for stats of the creatures, or spells having their cost cut in half (tons of those in the game actually), sure they work much better, but... yeah 
Many creatures get big stat boost, but how do you say which is better, Oty, Abyss, Archangel, Charger, Flesh Recluse... If I had to pick among creatures, I'd actually say Oty and Vamps (as they get double effect from upped version - damage AND healing).

Also, cards that act in different way unupped/upped *could* be on the list if you NEED the upped version for your strat to work obviously.

[Retribution]

I don't know how I could've forgotten shards. 

[Selenbrant]

Towers??? I would go for that.

[Retribution]

Forgot to mention one more: Nova ---> Supernova