Zenith Chronicler is a rare Artifact Creature — Phyrexian Construct card from Phyrexia: All Will Be One Promos (PONE), collector number 246p. Current market price: $1.08 (foil $0.80), TCGplayer market prices via Scryfall.
Whenever a player casts their first multicolored spell each turn, each other player draws a card.