Some cards trigger not on events but when a certain state is reached in the game (Phylactery Lich). To fully implement the rules for state-based triggers like this one, they need to have IDs so we can make sure they don't trigger more ofen than necessary.
Some cards trigger not on events but when a certain state is reached in the game (Phylactery Lich). To fully implement the rules for state-based triggers like this one, they need to have IDs so we can make sure they don't trigger more ofen than necessary.