look at the top card of your library mtg Lim-Dûl's Vault · Masters Edition (ME1) #148 · Scryfall Magic: Gathering Search Pojo's Magic The Gathering Card

Not only is the land untapped, which is uncommon among ramp spells, but it also can search for nonbasic Forests

Anyways, the idea of fleshing out this design by running a lot of Swamps and thus committing to Black was very important to success

Even if you dont its not terrible value at full price, especially since you have until the end of your following turn to play the exiled cards

The memes, the big plays, the nuanced synergies with both wide and tall boards its an absolute all-timer of a Magic card

The short version of the long answer is to play the deck and don't give up if you fail the first couple of times

Have fun!