How to counter Winter Wyvern in Dota 2

Winter Wyvern soars upon an arctic wind, granting her unobstructed movement and allowing her to exhale a blistering chill into each attack. While soaring, her attacks travel further and faster, and slow enemies with a magical freeze that strips them of 4% of their current health each second.

Launches a ball of brittle ice toward a unit. The ice shatters on impact, leaving the primary target completely unaffected, while hurling damaging splinters into nearby enemies in a 500 base radius. Enemies struck by these splinters are slowed by 28%.

Encases an ally in an icy cocoon, freezing them solid while healing a base amount as well as a percentage of their maximum health each second. The cocoon blocks all physical damage.

Winter Wyvern dispells then freezes an enemy in place while striking those nearby with a maddening curse which causes them to attack their frozen ally with increased attack speed. The frozen ally and those cursed to attack their ally are immune to all damage from their enemies with the exception of damage from Winter Wyvern or her controlled units.