Saheeli, the Gifted

+1: Create a 1/1 Colorless Human Pirate Token.
+1: The next spell you cast this turn costs 2 less to cast for each Pirate token you control as you cast it.
-7: For each Pirate you control, create a token that's a copy of it. Those tokens gain haste. Exile those tokens at the beginning of your end step.