Vekkailai, Scourge of the Sea

Vekkailai, Scourge of the Sea may block creatures
with islandwalk.
Vekkailai, Scourge of the Sea may block more
than one creature, as long as all creatures it
blocks are blue.
{5}{u}, {t}, Sacrifice an island: Search your library
for a Leviathan or Serpent card. Reveal it and
put it into your hand. Then shuffle your
library.