Historical Rules · 24 January 2020
Rule 810.9
Official source text from the 24 January 2020 Rules release
Damage, loss of life, and gaining life happen to each player individually. The result is applied to the team’s shared life total. Example: In a Two-Headed Giant game, a player casts Flame Rift, which reads, “Flame Rift deals 4 damage to each player.” Each team is dealt a total of 8 damage.