Glint-Sleeve Siphoner is a rare Creature — Human Rogue card from Aether Revolt (AER), collector number 62. Current market price: $0.26 (foil $1.36), TCGplayer market prices via Scryfall.
Menace Whenever this creature enters or attacks, you get {E} (an energy counter). At the beginning of your upkeep, you may pay {E}{E}. If you do, you draw a card and you lose 1 life.