Torture Chamber is a rare Artifact card from Tempest (TMP), collector number 313. Current market price: $0.49, TCGplayer market prices via Scryfall.
At the beginning of your upkeep, put a pain counter on this artifact. At the beginning of your end step, this artifact deals damage to you equal to the number of pain counters on it. {1}, {T}, Remove all pain counters from this artifact: It deals damage to target creature equal to the number of pain counters removed this way.