Timely Reinforcements | Magic: The Gathering
Formats Timely Reinforcements is Legal in
Official Oracle Text for Timely Reinforcements
Official Rulings for Timely Reinforcements
9/22/2011 : In a multiplayer game, you consider each opponent. If you have less life than one of your opponents and fewer creatures than one of your opponents (although this may be a different opponent), you'll get both bonuses.
9/22/2011 : In a Two-Headed Giant game, you'll compare your team's life total with the opposing team's life total. You'll then compare the number of creatures you control (ignoring creatures your teammate controls) to the number of creatures each opponent controls separately.