
Whenever you cast a noncreature spell, target creature gets +X/+0 until end of turn, where X is that spell's mana valuemana valueThe total amount of mana in a card's cost, ignoring colour. A card costing has mana value 4. X counts as 0 except on the stack..
Choose a BackgroundChoose a BackgroundYou can have a Background as a second commander. (You can have a Background as a second commander.)
Hover an underlined rule to see what it means.
Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.
Choose a Background lets you pair this card with one Background enchantment as a second commander. The deck's colours are both cards' colours combined.