Leaving aside the advisability of using these in game, did anyone ever write any rules for these devices?
Grenade, explodes with the effect of Vortex of Chaos, every turn at the start of the turn it scatters D6 yards and you reroll the radius. Dissipates on a scatter of 6" or the turn after it reaches 4 yards radius (to stop it completely dominating the game...even though it probably should.)