2019-11-12 : All of the mana is produced by the source of the original mana, not by Mana Abundance.

2019-11-12 : Any restrictions or riders on the original mana are applied to each player’s mana. If those refer to “you,” they refer to the player who adds that mana.

2019-11-12 : If two or more permanents with the world supertype are on the battlefield, all but the most recent one are put into their owners’ graveyards. In case of a tie, all are put into their owners’ graveyards.