GravSpike Local Grenade

GravSpike is a short-lived local gravity spike in a throw-safe shell — Vault Seal's answer to "stop that runner without shredding the hallway." For one ugly second the floor gets heavier in a tight radius; bones complain, drones kiss deck, and loose tools become weapons. The egg hums before it arms; if it does not hum, do not throw it. Power cell is one-shot and bonded. Misuse near a thin gallery deck is how you invent a new atrium.