Arkle, God Eternal

Flying, Indestructible, Hexproof
{w}{u}{b}{r}{g}: Search your library for a card, reveal it then put it into your hand. You may cast a spell with converted Mana cost 4 or less for without paying it's Mana cost. Any player may pay for this ability and they may use any color mana to pay for this ability. Activate this ability only once per turn.