Some cards got a Japanese showcase treatment exclusive to DFT Collector Boosters, like Loot, the Pathfinder and Chandra, Spark Hunter
If it is a CGC graded card, the scoring label on the top of the slab may vary based on the age of the slab (blue background, black background, etc)
these cards are generally legal for play and use existing cards with new art, names, and flavor to fit the theme
I think support is a pretty cool mechanic thats just waiting for more design work to power it up
it stabilizes the board the moment you cast it by exiling a problematic permanent
They often also contain special treatments, frames, arts, foils, etc, exclusive to a sets Collector Boosters