Quietus Spike | Magic: The Gathering
Formats Quietus Spike is Legal in
Official Oracle Text for Quietus Spike
Whenever equipped creature deals combat damage to a player, that player loses half his or her life, rounded up.
Official Rulings for Quietus Spike
10/1/2008 : If multiple Quietus Spikes trigger at the same time, that player loses half his or her life when the first ability resolves, then loses half of the remainder when the next ability resolves, and so on. The player does not lose the same amount each time.
6/15/2010 : In a Two-Headed Giant game, if a creature equipped with Quietus Spike would assign combat damage to the defending team, its damage is assigned to only one of the defending players. After combat damage is dealt, Quietus Spike looks at that player's life total (which is the same as the team's life total) when determining how much life the team will lose, which basically means the team's life total is halved. Here's an example of the math: The team has 19 life, so the player has 19 life. Quietus Spike causes the team to lose 10 life (19 divided by 2, rounded up). The team's life total becomes 9 (19 minus 10).