Kaltenzahn

The Kaltenzahn is one of the ten high dragons encountered in Dragon Age: Inquisition. It can be found in the east area of Emprise du Lion. To access the area requires completing the Restore Judicael's Crossing war table scouting operation.

Strategy
The dragon's stats are as follows:
 * Level 21 Boss
 * 245457 HP (Normal) / 267202 HP (Nightmare difficulty)
 * 65 Armor
 * Greater Cold Resistance
 * Fire Vulnerability
 * Immunity: All Disabling Effects
 * Immunity: Slowed
 * Perceptive

This dragon can generate "Guard" and summon dragonlings.

Rewards
1324 XP each 3600 Influence 5 Power (Varric only) (3) (7)  (4)  (20)  (15)  (16)

Trivia
"Kaltenzahn" is German for "Coldtooth" - considering it has high cold resistance, has a frost breath, and is vulnerable to fire, the name is likely intentional.