Master: watchtower. Requires at least one Gehenna card in play and a ready Seraph.
Black Hand vampires get +1 stealth and may strike for 2R damage. A ready Black Hand vampire you control may tap to cancel a Gehenna card as it is played. During your untap phase, burn X pool or burn this card, where X is the number of Gehenna cards in play (minimum of 1). Burn this card if another watchtower enters play.