Disenchanter Beast (multi-tiered template)

I have used these creatures a lot in my dungeons to explain why magic items can be rare. These creatures seek it out and feed on it, not evil creatures but natural ones who are following their instincts. They affect enchanted magic items only, so in my world that means created items. Many simple items are natural and these cannot be enhanced nor drained. These creatures are often raised by non-magic using species to temper the threat of spell-casters.

Disenchanter Beast (3 template bases - Lesser, Greater, Master)

Size and type: does not change
Hit Dice Adjustment: +2 HD or +6 HD or +10 HD
Speed: As original creature

Armor Class: +3 deflection bonus for Lesser, +6 bonus for Greater; +12 bonus for Master
Attack: As per the original creature plus HD bonus
Full Attack: As per the original creature
Spell resistance: SR 15 / SR 20 / SR 25
Special Abilities: Drain Magic, Sense Magic: Anti-Magic Aura, Awakened Ferocity
Special Qualities: Dmg Reduction 3/5/10

Abilities: As base creature plus  +2 / +4 / +8 on any three ability scores
Skills: +5 on perception checks and sense motive; +3 to skill checks for every additional HD attained

Environment: Remote locations
Organization: Solitary
Treasure: None
Alignment: Usually Neutral

Drain Magic: Magic items that touches a disenchanter beast must save vs Will DC 25 / 30 / 35 or be nullified. Items with charges lose all charges, if it is a permanent magic item, the lose it's magic properties for 1d12 hours / 1d3 days / 2d4 days.

Sense Magic: Can sense the presence of any magic (spells or items) in the radius of 500 feet.

Anti-Magic Aura: Magic has a hard time working in a disenchanters presence. Casters must make a concentration check DC 20/25 /30 to be able to cast spells within 50 ft of a disenchanter beast. Items with charges lose three times / five / ten the required charge every time they are used in the 50 ft radius.

Awakened Ferocity: Disenchanters gain a +5 morale bonus if disturbed from their sleep; this bonus applies to all saves, attacks and skills.

Reduced Stealth: When their scales flare due to the presence of magic, they suffer a -5 / -10 / -15 to their stealth checks as their blue scales flare brightly

These creatures were originally breed by the Society of  Contemplation - a neutral aligned cult dedicated to creating magic free areas but they eventually escaped to breed wild and true. Now they usually exist as wild creatures inhabiting herds of their base animal. Most common known herds include:snakes, gorillas, bears, wolves, ferrets and eagles

They are similar in size and shape with their base creature, except they always have light blue skin with dark electric blue triangles spot their body. When in the presence of magic their skin flares to dark blue. These creatures feed on magic items, which they can naturally sense up to 500 feet away.

Disenchanters are passive creatures, attacking only when other beings approach them. It is difficult for adventurers to approach them, as the presence of magic aggravates them to the point of aggression. Items left within 50 feet of the snake’s presence for more than 24 hours; permanently loses their dweomer without a saving throw. For this reason, adventurers avoid disenchanters whenever possible. If they snatch powerful items, they retreat to their lair, curl around it and sleep. In this hibernation, they are actually more aware of their surroundings then when awake as per their ferocity ability.

These creatures often run in the same packs that their base creature come from, with one or two members being of the disenchanter variety and the rest being standard beasts. They are fully compatible with non-magic versions of themselves but their offspring is 90% likely to have disenchanter abilities. Disenchanters, regardless of their type never attack other spell-draining creatures; few are able to communicate with each other but they inherently understand that they share a goal. Most of the oldest varieties haunt lonely tombs, spires and abandoned lairs.

There are a few places that successfully use these creatures to curb the presence of magic. Most fail as they cannot preserve the creatures ferocity with their need to control them. The best, such as the spire city of Lecenna, have wild disenchanter monkeys roaming around, stopping magical threats but limiting their own spell-casters capacities.