Indris, the Hydrostatic Surge is a mythic Legendary Creature — Otter Incarnation card from Alchemy: Bloomburrow (YBLB), collector number 25.
When Indris, the Hydrostatic Surge enters, conjure four cards named Lightning Bolt into your library. They perpetually gain storm. Then shuffle. Whenever you cast an instant or sorcery spell, draw a card.