Glory's Corruption

At the beginning of each player's upkeep, that player targets a creature. That creature's controller sacrifices it, gains life equal to twice that creature's converted mana cost, and gains an emblem with "creature spells costs {1} more to cast"; unless its controller pays 2 life.
When Glory's Corruption leaves the battlefield, each player with an emblem with "creature spells cost {1} more to cast" losses 3 life for each of them.