And if the Pirate deck has enough legendary creatures in it, then Hero's Blade is a strong option, equipping itself for free onto legendary creatures and giving them +3/+2 (a fine reprint from the Khans of Tarkir block).
1 Relic of Legends
Admittedly, Nine Gales wasnt a strong choice even before Nadu, only seeing play in around 6000 Commander decks
Bill the Pony Stay golden, Bill the Pony
Its a card that acts as a counter-summon, which can be used if an opponent casts a Summon spell that does not match the colour of one of the creatures in your control
The other side is a passable creature, but I think the overall package here is underwhelming +2/+2 is a nice boost for the cost, but you still set yourself up for an ugly 2-for-1, and even though this can come back from your graveyard the cost is so high that it is only something you do when you have absolutely nothing else you can do