Necrotic Aether Surge

(You may cast a legendary sorcery only if you
control a legendary creature or planeswalker.)
Energize (You may cast this spell by paying {e}
equal to its mana value; Instead of paying its mana
cost. If that spell has an X in its cost than you
may pay any amount of {e} for X.)
Each player mills X. Choose up to X creatures
in any graveyard and put them onto the
battlefield under your control.