It allows an artifact, sorcery, instant, or enchantment to have creature types like Eldrazi, giant, or elemental as part of its type line, which means that card can trigger abilities that trigger when you cast certain creature types or when certain creature types enter
With Dovin, Grand Arbiter producing thopter tokens and helping to enable Mox Amber, and Scrabbling Claws giving us a reasonable artifact that can cycle while also triggering our artifact synergies like Sai, Master Thopterist, it felt like we had something interesting here
Here are the cards of which I kept up to four copies: Akroma, Angel of Wrath Bane of the Living Blade Sliver Brood Sliver Caller of the Claw Chromeshell Crab Clickslither Crypt Sliver Essence Sliver Gempalm Incinerator Hunter Sliver Graveborn Muse Magma Sliver Mistform Sliver Mistform Ultimus Phage the Untouchable Root Sliver Shifting Sliver Synapse Sliver Tribal Forcemage Ward Sliver Willbender White Knight Windborn Muse Wirewood Hivemaster Withered Wretch That may seem like a lot, but lets put it into context
Hexgold Halberd: Trample and First Strike are among the best combat keywords, and For Mirrodin