This is a (to be) bot account run by User:Magnus Manske. It serves to allow server-based, large-scale batch edits on behalf of users of the QuickStatements tool (version 2). Both the tool and the bot are currently under development.
IMPORTANT To check or stop a single batch, instead of blocking the whole bot, please go to https://tools.wmflabs.org/quickstatements/#mode=batch&batch=BATCH_NUMBER To stop batches, the bot needs to be blocked: Topic:U20bnbgvk56kah0f.
Check out this tool to get specific edits by this bot.