Hivestone

Slivers were built on a feedback loop: every member grants its keyword to every other Sliver, so the deck's payoff scales with how many of the type you can field. This artifact short-circuits the prerequisite by retyping your whole board. Every creature you control becomes a Sliver, which means every Sliver lord's anthem, every shared keyword, every "all Slivers" buff now blankets non-Sliver bodies too: a random fattie, a token, a dork that wandered in from another deck all inherit pump, flying, haste, regeneration, whatever your Sliver suite is broadcasting. It cuts the other way as well, since it makes opposing tribal hate that names Slivers suddenly relevant to your entire team, and it does nothing in isolation: with no actual Slivers in play, retyping your creatures as Slivers grants them nothing. What you are trading is breadth against dependency. You get to staple the tribe's collective payoffs onto creatures that were never printed as Slivers, but only as a follower to a board that already wants to be Slivers. It is a glue piece, not an engine: an effect that lets a tribal shell bend its rules without abandoning them.