The Life Aggregator is an item added by Botania. It allows the player to move Monster Spawners by right-clicking a Monster Spawner with it. This will absorb the Spawner into the Life Aggregator. Right-clicking the Aggregator to any block will place it down and release the Spawner, which will break the Aggregator in the process. Its Lexica Botania entry is hidden until the player acquires Elven Knowledge.