Leyline of Punishment

A player's "opening hand" is the hand of cards the player has after all players have taken mulligans. If players have any cards in hand that allow actions to be taken with them from a player's opening hand, the starting player takes all such actions first in any order, followed by each other player in turn order. Then the first turn begins.

Effects that replace or redirect damage without using the word "prevent" are not affected by Leyline of Punishment.

Spells and abilities that would normally cause a player to gain life still resolve, but the life-gain part simply has no effect.

If a cost includes life gain (like Invigorate's alternative cost does), that cost can't be paid.

Effects that would replace gaining life with some other effect won't be able to do anything because it's impossible for players to gain life.

If an effect says to set a player's life total to a certain number, and that number is higher than the player's current life total, that part of the effect won't do anything. (If the number is lower than the player's current life total, the effect will work as normal.)