Does a split card's mana value in the graveyard count as the sum of both halves?

A split card has two halves, each with its own mana cost printed on the card. However, the rules specify that a split card's mana value is calculated differently depending on where the card is. In the graveyard (or hand, library, exile, or battlefield), you add both halves' mana costs together to get the total mana value (CR 709.4c).

This means a card like Fire // Ice — with Fire costing {1}{R} (mana value 2) and Ice costing {1}{U} (mana value 2) — has a mana value of 4 while it sits in the graveyard, not 2.

The exception is when a split card is on the stack. Once you cast one half, only that half's mana cost is used to determine mana value (CR 709.4a). So if you cast just Fire, it has mana value 2 while on the stack.

This distinction matters for effects like Snapcaster Mage's interaction with Flashback, or cards like Delve or Unburial Rites that care about the mana value of cards in the graveyard — the full combined value applies in those zones.

Example: You have Wear // Tear (Wear costs {1}{R}, Tear costs {W}) in your graveyard. Its mana value there is 3 (1+1+1). A card that says "target card in a graveyard with mana value 3 or less" can target it, even though neither half alone costs 3.