Commander Sivara is a 4 Mana Cost Legendary Mage Minion Naga card from the Voyage to the Sunken City set!
Battlecry: If you've cast three spells while holding this, add those spells back to your hand.
Flavor TextWith six legs, gills, and an impressive array of magic, Sivara is an all-terrain-spellcaster.
Commander Sivara Additional Information
If you’ve cast more than three spells while holding Sivara, you only get the first three you cast back from the Battlecry. (Source)