The Duvalia has been revealed as an Infected card in the Resident Evil DBG expansion, Alliance. The Duvalia has an interesting effect; if it defeats a player, the player with the most decorations is given five "ammo x10" cards. This effect is meant to put the player in the lead at a slight disadvantage by giving them cards with minimal amounts of gold and ammo.
The Duvalia has 60 health, the same as Nemesis from the base set, and can deal 40 damage if the player does not defeat it. On the other hand, it gives 5 Decorations to the player who defeats it.