Lossil, The Crystal Faerie

Flying, lifelink
Whenever an opponent attacks you or a planeswalker you control with one or more creatures, he or she exiles one of those creatures.
"The faeries I met in the Leival forest all shared a feeling of warmth but Lossil, a faerie as tall as myself, exposed a feeling of cold. Her powers were not to underestimate either as she turned her attackers to glass." - Jonte, The Lost Warden