Aneki, Fate-Sonned

Surveil X, where X is the amount of life paid to
cast Aneki. (Look at the top X cards of your library,
then put any number of them into your graveyard and
the rest on top of your library in any order.)
Once per turn, you can cast an Instant or Sorcery
from your graveyard by paying life equal to its
mana value. If you do, that card is exiled, and
target creature you control gains hexproof
until end of turn.