Apparently we somehow missed this one.
DBDS-JP018 空牙団の参謀 シール Seal, Staff Officer of the Skyfang Brigade
Level 4 DARK Beast-Warrior Effect Monster
You can only use this card name’s (1) and (2) effects once per turn each.
(1) During your Main Phase: You can Special Summon 1 “Skyfang Brigade” monster from your hand, except “Seal, Staff Officer of the Skyfang Brigade”.
(2) While this card is currently in a Monster Zone, if another “Skyfang Brigade” monster is Special Summoned to your field, other than this card: You can target 1 “Skyfang Brigade” monster in your GY; add that monster to your hand.