Cyraeleon, Assasin of the Sea

When Cyraeleon, Assassin of the Sea comes into play, you may reveal a card in your hand, if you do, return target permanent with converted mana cost equal to the converted mana cost of the revealed card, to its owner's hand
{w}{u}{b}{g}: Place Cyraeleon, Assassin of the Sea in the command zone from the battlefield. The next time you play Cyraeleon, Assassin of the Sea, you may cast it for {2}{b/g}{w/u}. Use this ability only if Cyraeleon, Assassin of the Sea is your commander and only as a sorcery