Champion a Merfolk (When this enters the battlefield, sacrifice it unless you exile another Merfolk you control. When this leaves the battlefield, that card returns to the battlefield.)

Whenever Wanderwine Prophets deals combat damage to a player, you may sacrifice a Merfolk. If you do, take an extra turn after this one.

Flying

When Waterwind Scout enters the battlefield, create a Map token. (It's an artifact with ", , Sacrifice this artifact: Target creature you control explores. Activate only as a sorcery.")

, : Target creature can't be regenerated this turn. Damage that would be dealt to that creature this turn can't be prevented or dealt instead to another permanent or player. When the creature dies this turn, exile the creature.

Defender

You may look at the top card of your library any time.

You may cast creature spells from the top of your library.

Whenever you cast a creature spell from your library, it becomes a black Bird in addition to its other colors and types, has flying, and has base power and toughness 1/1.