Board Thread:Game Discussion/@comment-107.216.238.109-20130924065109/@comment-18295166-20130924235536

From the home screen you will see a button called "upgrade". That will enable you to "level up" your cards with Transmetal or other cards, as already mentioned. You can "transcan" the robot and alt cards to combine them to make an even stronger card

http://transformers-legends.wikia.com/wiki/Trans-Scan

Be aware if you upgrade your cards and then transcan, the level will reset back to 0. So your 2 upgraded halves will become a weaker single card, but with more "potential". The new level 0 transcanned card starts off stronger by about 50% than the base level "half" card and upgrades correspondingly.

Also keep in mind, upgrading to max level consumes a huge amount of resources - credit and cards. The upgrade leveling is exponential, not linear. For example to upgrade a super rare card from level 0 to lvl 24 takes around 21,000 credits and around 24 uncommon cards, but the same amount of credits and cards will only take you from lvl 63 to lvl 64. So only fully upgrade really good cards. When building your team now I would transcan what you can and upgrade only to about lvl 20 or 30. Save your resources for the important cards, like the Optimus you have now. :-)