Lutri, Pauper Otter is a rare Legendary Creature — Elemental Otter card from Mystery Booster 2 (MB2), collector number 597. Current market price: $0.30, TCGplayer market prices via Scryfall.
Companion — Your starting deck contains no cards with a silver, gold, orange, or purple expansion symbol. (If this card is your chosen companion, you may put it into your hand from outside the game for {3} as a sorcery.) When Lutri, Pauper Otter enters the battlefield, discard your hand, then draw three cards.