Captain, Rhea Stormraven

Whenever one or more Pirates you control deal combat damage to a player, that player exiles
the top card of their library. You may cast that card until end of turn, and you may spend mana as though it were mana of any color to cast it.

At the beginning of your end step, create X Treasure tokens, where X is the number of nonland permanents you control but don’t own.
The storm is her ally, the sky her domain. No ship or sea can escape her relentless pursuit.