Ledger Shredder is a rare Creature — Bird Advisor card from Streets of New Capenna Promos (PSNC), collector number 46p. Current market price: $10.57 (foil $7.99), TCGplayer market prices via Scryfall.
Flying Whenever a player casts their second spell each turn, this creature connives. (Draw a card, then discard a card. If you discarded a nonland card, put a +1/+1 counter on this creature.)