You can play this card from your Market if you met its requirement in a single turn. If a Bargain card is in you deck, you can build a Market.
Bargain is a keyword introduced in The Flame of Xulta. It allows the card to be played directly from the Market when the listed condition is met. Including a card with Bargain also allows the inclusion of a Market even if the deck has no merchants.
The Flame of Xulta introduced this in a cycle of five cards, one in each Faction
- Find more cards with Bargain in its category page.
Decimate was first seen on Draconic Ire, in a The Flame of Xulta spoiler-season reveal by Scarlatch on the game's Discord, before the keyword's effect was known. The mechanic was later explained in Dire Wolf Digital's mechanic reveal article.