Legendary Creature — Sliver 7/7, WUBRG (5)
Rare
All Sliver creatures get +1/+1 for each other Sliver on the battlefield.
Hidden within the clicking, chittering swarm is a unique mind, still young, but growing more aware as time passes.
Illus. Ron Spears

5/1/2007: If Sliver Legion and two other Slivers are on the battlefield, for example, each of them gets +2/+2.
Legal in Vintage (Type 1)
Legal in Legacy (Type 1.5)
Legal in Classic (MTGO)
Legal in Commander
Legal in Modern