Rashmi and Ragavan is a mythic Legendary Creature — Elf Monkey card from March of the Machine Commander (MOC), collector number 94. Current market price: $0.92 (foil $1.40), TCGplayer market prices via Scryfall.
Whenever you cast your first spell during each of your turns, exile the top card of target opponent's library and create a Treasure token. Then you may cast the exiled card without paying its mana cost if it's a spell with mana value less than the number of artifacts you control. If you don't cast it this way, you may cast it this turn.