Dalkovan Encampment is a rare Land card from Tarkir: Dragonstorm Promos (PTDM), collector number 253s. Current market price: — (foil $1.11), TCGplayer market prices via Scryfall.
This land enters tapped unless you control a Swamp or a Mountain. {T}: Add {W}. {2}{W}, {T}: Whenever you attack this turn, create two 1/1 red Warrior creature tokens that are tapped and attacking. Sacrifice them at the beginning of the next end step.