Firewake Sliver is a uncommon Creature — Sliver card from Time Spiral (TSP), collector number 238. Current market price: $0.35 (foil $4.99), TCGplayer market prices via Scryfall.
All Sliver creatures have haste. All Slivers have "{1}, Sacrifice this permanent: Target Sliver creature gets +2/+2 until end of turn."