In the DS version of IV (and its IOS and pc ports) you find or are given abilities called Augments- like Counter, MP+50%, and Dualcast. There's also one called Omnicast which makes single target spells like Haste and Esuna hit multiple allies or enemies. It all adds an extra dimension to an otherwise plain battle system. I like it. It also encourages new playthroughs because you can't get all of them on your first run through.

I wasn't sure if your question was sincere or not, but I can never pass up an opportunity to blab about FFIV, especially the remakes.