|Bestows a strong beacon upon a targeted creature. It announces the presence and location of the marked creature to everyone on the same level.|
Sentinel's Mark is a monsters-only spell that attempts to temporarily afflict you with the Mark condition, causing all monsters on the current floor to know your location and seek you out. Sleeping monsters are not affected by this until they wake up. Characters with high magic resistance may negate the effect entirely. Its spell power doesn't depend on the attacker's HD but is always 125 (78 after stepdown). Characters with at least 178 MR (++++) are immune to this enchantment, but 120 MR (+++) is enough to reliably resist it.
The following enemies cast Sentinel's Mark:
This spell was added in 0.12.