All permanents on the battlefield. Second Wind attached to Clever Conjurer. Clever Conjurer does not have summoning sickness.
All permanents on the battlefield. Second Wind attached to Kelpie Guide. Kelpie Guide does not have summoning sickness.
All permanents on the battlefield. Second Wind attached to Vizier of Tumbling Sands. Vizier of Tumbling Sands does not have summoning sickness.
All permanents on the battlefield. You control a creature that can tap to produce at least . Yenna does not have summoning sickness.