Helm of Ahnaxbos

Equipped creature is an gets +1/+1, "Prevent
all damage Zombies would cause this creature."
and "This creature may block one extra Zombie
creature each turn." It becomes an enchantment
creature.
Helm of Ahnaxbos' casting cost is {u}{b} for
calculating Devotion.
Equip {3}
"Not even a tide of Wandering Dead could cause
one of Ahnaxbos' Helmed Guardians to fall."