Aisha's Tear

In order to obtain Aisha's Tear, talk to Kouslo outside The Frost Keep entrance, he will have a green quest called "Materials for Kouslo" that will ask you to gather 8 Frost Ember. Once you get the quest, go in The Frost Keep (can be done in Elite 1 difficulty) and kill the first mobs that appear, the guards, they will drop the 8 Frost Ember needed and you can go outside and turn in the quest to Kouslo NPC, no need to finish the run. Aisha's Tear will let you tame both Frost and Mist (Rondo's companions w/ Phantom).