Celestial Mantle

In a Two-Headed Giant game, Celestial Mantle’s essentially doubles the team’s life total. Specifically, the triggered ability will affect one player’s life total, and then the team’s life total is adjusted by the amount of life the player gains as a result of this ability. Suppose a creature enchanted by Celestial Mantle deals combat damage to an opponent, and that creature’s controller’s team has 11 life. That player then has 11 life, so it’s doubled to 22, for a net gain of 11 life. The team’s life total becomes 22 (11 + 11).

If a player’s life total is doubled, that player actually gains or loses the necessary amount of life. For example, if the life total of the enchanted creature’s controller is 14 when Celestial Mantle’s triggered ability resolves, the ability causes that player to gain 14 life. Other cards that interact with life gain or life loss will interact with this effect accordingly.

If a creature dealing combat damage at the same time as the enchanted creature has lifelink, the life gained due to lifelink happens before Celestial Mantle’s triggered ability resolves.