Serra's Statue

{w}{x}, {t}: Half of X rounded down creatures you
control with flying gain your choice of hexproof
or indestructible.
Sacrifice Serra's Statue: You get an emblem with
"At every end step, all players lose life equal to
the number of non-flying creatures they control."
You can see the shimmering statue all the way from
the pyramids of Amonkhet, from the watchtower of Dominaria, and from the pillars of the spooky citadel.