Champion of the frost titan

Frost aura. A creature that touches the champion or hits it with a melee attack while within 5 feet of it takes 6 (2d6) cold damage. 

Ice armor. At the start of its turn, the champion gains 15 temporary hitpoints as ice grows on its body.

Ever vigilant. The champion can see through any Ice effigy of the frost titan as if it were in its space provided the champion is motionless and within 1 mile of the effigy. 

Multiattack. The champion can make three Ice lance attacks

Ice lance. Melee or Ranged Weapon Attack: +8 to hit, reach 10 ft., range 20/60 ft., 1 target. Hit: 12 (2d8 + 4) piercing damage.  6 (2d6) cold damage.

Move effigy. If the champion is within 120ft of an Effigy of the frost titan. The champion can use its bonus action to move the Effigy 30ft in one direction. 

Frost bites. When the champion is hit with a melee weapon attack it can use its reaction to incase the weapon in ice. A weapon encased in ice in this way has a (1d4) subtracted from all attack and damage rolls until the ice is removed. A creature within 5ft of the weapon can use an action to break the ice off or if the weapon deals fire damage on an attack the ice melts away.