Akidna, Mother of Hydras

{t}: Generate {w}{u}{b}{r}{g}{c}

When you tap a permanent for {1} or more you may create a Hydra's Egg with "The first time you tap a permanent for one or more colorless mana on your turn put a counter on this artifact and for each counter on this artifact reduce the cost of your creature spells {1}

When this Artifact reaches 5 counters exile it and return it to the battlefield transformed."