Grasping Scoundrel

Grasping Scoundrel gets +1/+0 as long as it's attacking.

Crimson Fleet Commodore

Trample
When Crimson Fleet Commodore enters, you become the monarch.

Desperate Castaways

Desperate Castaways can't attack unless you control an artifact.

Boarding Party

Haste
Cascade (When you cast this spell, exile cards from the top of your library until you exile a nonland card that costs less. You may cast it without paying its mana cost. Put the exiled cards on the bottom in a random order.)

Brazen Freebooter

When Brazen Freebooter enters, create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.")