Look to the Stars — At the beginning of your upkeep, put a time counter on Wilfred Mott. Then look at the top X cards of your library, where X is the number of time counters on Wilfred Mott. You may put a nonland permanent card with mana value 3 or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order.
If Wilfred Mott leaves the battlefield after its ability has triggered but before it resolves, use the number of time counters it had on it the last time it was on the battlefield to determine the value of X.