Dance with Calamity (Extended Art) [March of the Machine Commander] Human Soldier Scout Feeding Grounds

Feeding Grounds

and you may spend mana as though it were mana of any color to cast it

Whenever you put one or more counters on Aragorn

A sphere pushes equally in all directions

When Worldspine Wurm is put into a graveyard from anywhere

Dance with Calamity (Extended Art) [March of the Machine Commander] Human Soldier Scout Feeding GroundsSet: March of the Machine Commander Type: Sorcery Rarity: Rare Cost: {7}{R} Shuffle your library. As many times as you choose, you may exile the top card of your library. If the total mana value of the cards exiled this way is 13 or less, you may cast any number of spells from among those cards without paying their mana costs.