Ythona, Seeker of Truth

+4: Search your library/graveyard for up to 5 blue and/or merfolk cards. Put them in your hand. If you search your library this way, shuffle it.
-3: Create a 3/3 blue Merfolk token with blue landwalk and flying.
-8: Gain an emblem that says "When a blue non land permanent does damage, gain the amount of damage dealt.