Twilight Drover is a rare Creature — Spirit card from Tarkir: Dragonstorm Commander (TDC), collector number 136. Current market price: $0.24, TCGplayer market prices via Scryfall.
Whenever a creature token leaves the battlefield, put a +1/+1 counter on this creature. {2}{W}, Remove a +1/+1 counter from this creature: Create two 1/1 white Spirit creature tokens with flying.