Sacrifice the Masses

Destroy all non legendary creatures you control
and any legendary creatures you control of your
choice.
You gain X life where X is the combined
toughness of all the creatures that died this turn,
then you may draw any number of cards up to X,
if you drew at least 1 legendary card this way you
may play 1 of them by paying for half their
converted mana cost rounded down as if it were
generic mana, if it's a land you may play it even if
you played another land this turn.