At the beginning of your upkeep, surveil 1. Then if you have seven or more cards in your graveyard, you may transform Heart of the Explorer.
Azcanta, the Sunken Ruin
Legendary Land
{T}: Add {U}.
{2}{U}, {T}: Look at the top four cards of your library. You may reveal a noncreature, nonland card from among them and put it into your hand. Put the rest on the bottom of your library in any order.