Spoiler alert: It draws cards.
Kinman na Tsubo / Pot of Wealth
You can only activate 1 “Pot of Wealth” per turn. During the turn in which you activate this card, you cannot Special Summon monsters, except by Pendulum Summoning. (1) Choose 3 Pendulum Monsters in your Graveyard or that are face-up in your Extra Deck, shuffle them in your Deck, then draw 2 cards.
Source : Konami’s Japanese Yugioh Blog