Lazav's Lost Trinket

If you look at or reveal Lazav's Lost Trinket
while scrying, surveiling, or revealing the top
card of your library, you may cast it from your
library without paying its mana cost.
{t}: Add {c}. If there are 10 or more cards in your
graveyard, instead add {u} or {b}.
{t}: Surveil 3, then put this card on top of your
library.