The magic of this enchantment creates a dark sign upon any surface, usually a gate, chest or door, something which can be opened. The sign radiates a sense of foul corruption, so that a character must take a Fear 11 test each time he wants to approach it until he passes a test. The Sign also adds +10 Health to whatever surface it protects, and makes it firmly locked unless the Mage is there to open it, finally if the protected object is opened anyway the sign explodes, doing D4+4 damage to anyone within 6 strides of it.
Blood+5 Health, +2 damage, or +2 strides range per blood level.