Whenever this minion attacks or is attacked, summon a 3/3 Vespyr Night Howler nearby.
- Frostiva's ability only procs when she is directly attacked. If she stands in a Blast targeting another minion or General no Night Howler will spawn. If she is the target of a Blast attack the Night Howler will spawn. The same counts for Frenzy. For the ability to proc Frostiva herself has to be the attack's target.
- If you use Grasp of Agony on a Frostiva and then punch and kill it, the 3/3 Night Howler that Frostiva summons does not take 3 damage.
- Homeostatic Rebuke causes a Night Howler spawn.
Because Frostiva can spawn Vespyr minions she can be used in Vespyr decks.