Starcraft – ny way to get back the WoL command card in HotS

The tooltip for Scan Move:

Orders selected units to move to the target area or follow the target unit. Scan-moving units will not engage enemies.

Scan-move allows the use of auto-cast abilities. If using a regular move command, the unit will not use auto-cast abilities.

Also note that the default hotkey for both scan-move and attack is "A". If you have a regular unit with an attack, and a unit with scan-move as orders, and you group them together and use the hotkey "A", the game will try to execute the attack first. If that order is successful given, the scan-move is then executed.

E.g. If you have a marauder and medivac in one group, and you use the "a" hotkey and left click on a zealot the marauderwill attack the zealot, and the medivac will scan-move to the zealot. If the zealot moves away, the medivac will follow it.

E.g. If you have a marauder and medivac in one group, and you use the "a" hotkey and left click on a mutalisk (remember marauders cannot attack air units), the game will display the error "Must target ground units", and the medivac will not scan-move to the mutalisk. Here is a list of units, from melee maps, with Scan Move as an ability:

• Warp Prism
• High Templar
• Infestor
• Overlord
• Raven
• Medivac (only this unit has an auto-cast ability)

If I'm understanding your question properly, in order to have two Heart of the Swarm licenses you need two Wings of Liberty licenses.

Since Heart of the Swarm is not a stand alone expansion, you need to have all the prerequisite games in order to play it (each copy).

You can see for example, on this Cataclysm box art for World of Warcraft, that it requires "Wrath of the Lich King to play". Wotlk says it requires TBC, and TBC requires the base game. It is expansions all the way down. This trend stands true for all Blizzard games to date, as they don't release stand alone expansions.