Tahm Kench, the River King

When you cast Tahm Kench, you may pay {w/b}{w/b} and 2 life. If you do, seach your library for
a legendary creature card and put it onto the
battlefield. Shuffle your library.
When this card enters the battlefield, support 1.
Tank
"Call me king, call me demon - water forgets the
names of the drowned."