Delney also gives each creature under their protection evasion, enabling them to avoid being blocked by creatures with power 3 or greater, making swarms of 1/1 and 2/2 tokens into serious threats against most boards
This is not especially hard to do in any five-color deck, but its even easier if youre also playing Leyline of the Guildpact, which you probably should be doing in a five-color deck anyway (unless its Commander, where it is very banned)
In this decks current state, the everything counters on land comes into play far more than those on creatures as there isnt a particular large emphasis on typal abilities among the 99
Here are the list of Slivers that you can find: The First Sliver Bonescythe Sliver Enduring Sliver Diffusion Sliver Sentinel Sliver First Slivers Chosen Lancers Sliver Steelform Sliver Scuttling Sliver Dregscape Sliver Leeching Sliver Belligerent Sliver Bladeback Sliver Blur Sliver Cleaving Sliver Hollowhead Sliver Lavabelly Sliver Sliver Hivelord This also happens to be almost all of the Slivers currently legal for Brawl on MTG Arena, which isnt really enough for a proper Sliver deck
These unique characteristics make this type of booster box very desirable to players who appreciate the art or want to bling out their decks, especially since these types of cards either dont show up or are considerably rarer in regular booster packs