How many members of a Two-Headed Giant team can be affected by an effect that redistributes life totals?

In a Two-Headed Giant format, a team consists of two players who share a collective life total. When it comes to effects that redistribute life totals, only one player per team can be affected because the life totals in this format are considered as a single total for the team.

Typically, effects that redistribute life totals work on the individual player level; therefore, when an effect specifies redistribution, it will affect just one member of the team at a time and must choose which player has their life total altered. The choice is often determined by the player initiating the effect or based on the specific wording of the card or ability, but it cannot impact both players at once because the format rules do not permit it.

This is tied to the nature of individual actions in gameplay and how life totals are managed in a team scenario, emphasizing that life management is localized to each player's individual game state despite their cooperative team dynamics. If the question specified that both players could be affected, it would not align with how life totals are handled in Two-Headed Giant.