Just making sure I understand this interaction. The release notes say "An adventurer card is a creature card in every zone except the stack, as well as while on the stack if not cast as an Adventure. Ignore its alternative characteristics in those cases. For example, while it's in your graveyard, Giant Killer is a white creature card whose converted mana cost is 1. It can't be the target of the triggered ability of Mystic Sanctuary."
So if Dark Confidant's upkeep trigger reveal's Bonecrusher Giant, you would lose 3 life -- not 5 life -- correct? This is unlike revealing a split card like Fire // Ice which would count both halves?
an adventurer card in a player's library has only its normal mana cost (without regard to its Adventure characteristics), so that its converted mana cost is generally based on that mana cost (C.R. 715.4, 202.3, 109.3), and
a split card in a player's library has a converted mana cost equal to the sum of the converted mana costs of its two halves, because "[t]he mana cost of a split card is the combined mana costs of its two halves" while it's in that library (C.R. 708.4, 708.4b, 202.3).
EDIT (Oct. 1): Edited to conform to rule update with Throne of Eldraine.
EDIT (Jan. 10, 2021): Include direct answer.
Just making sure I understand this interaction. The release notes say "An adventurer card is a creature card in every zone except the stack, as well as while on the stack if not cast as an Adventure. Ignore its alternative characteristics in those cases. For example, while it's in your graveyard, Giant Killer is a white creature card whose converted mana cost is 1. It can't be the target of the triggered ability of Mystic Sanctuary."
So if Dark Confidant's upkeep trigger reveal's Bonecrusher Giant, you would lose 3 life -- not 5 life -- correct? This is unlike revealing a split card like Fire // Ice which would count both halves?
[180 classic cube]
For the purposes of Dark Confidant—
EDIT (Oct. 1): Edited to conform to rule update with Throne of Eldraine.
EDIT (Jan. 10, 2021): Include direct answer.