Whenever it enters the battlefield or attacks, you return a permanent with mana value 3 or less from your graveyard directly to the battlefield
Also, not all combos have to go infinite
Sauron, the Dark Lord The best new card for the Command zone is Sauron, the Dark Lord
Spiritmonger Spiritmonger is an easy card to stave off for a long time, since almost any blocker can jump in front of him
It's an especially good feeling when you can defeat your opponents with cards from their own deck, and the flavor of doing so in a Pirate based deck is difficult to pass up
Modern Horizons 3 contains the 5 basic lands (Plains, Island, Swamp, Mountain, and Forest) with variant treatments, plus an uncommon Snow-Covered Wastes (included as one of the 101 uncommons) with its variant treatments