Draconic Request

(You may cast a legendary sorcery only if you control
a legendary creature or planeswalker.)
Draconic Request can't be countered.
Search your library for a legendary Dragon
creature card, reveal it, and put it into your
hand, then shuffle your library. Draconic
Request deals damage equal to that card's
converted mana cost to up to one target creature
or planeswalker.