More precisely: you put a card from your hand on the bottom of your deck, then draw until you have 5 cards in your hand (don't use this card if you don't have at least one card in your hand to make the first requested tribute)
But its sort of just another wurm in our Baru deck
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Most require you to have both halves in play, like Brisela, but others may require both halves to attack (like Mishra, Claimed by Gix), or have a certain amount of cards in your graveyard (like Titania, Voice of Gaea)
Obviously, like all Secret Lairs, these cards come with new art, which will affect the resale value, but the baseline card value here isn't half bad - take a look: Inked Mulldrifter - $0.35 Burnished Hart - $0.25 Ice-Fang Coatl - $1.70 Deathrite Shaman - $8.50 Crypt Ghast - $13 Total - $23.80 Back in My Day
This Ukkomon, paired with its promo counterpart, was a must-include in most aggressive decks