Ice Spire

Creates an Ice Spire at the target spot, slowing enemies around it. Can take 4 hero hits or 8 creep hits and when destroyed it will create a Frost Blast around it. Chain Frost can be cast on the Spire and can bounce to the Spire and damage the spire by 1 hero attack if there are no other enemies in range. Lich can cast Frost Shield on the Spire. Each Frost Shield tick will heal the spire by 1 hero attack.