Units with EnduranceEndurance: Ready's on each player's turn, and can't be stunned or exhausted by spells or effects. cannot be stunned. If a stunned unit is given Endurance (such as with Infinite Hourglass), the stun will be removed and the unit will be readied.
If a unit is stunned by an ongoing effect, such as Ice Sprite and Permafrost, the stun will be removed as soon as the source is killed or silenced.
Prior to the release of Homecoming, SilenceSilence: Remove all text from a card and its attachments. removed Stun from a unit. It will no longer do this, but in cases such as Permafrost or Ice Sprite, silencing these cards will remove the ongoing stun.