— Cards played to your reserve area cannot be moved in the same round.
— Game text that applies when a card is in the reserve area is immediately effective. Unlike moving a card, there is no requirement to wait the next round before you use a card’s reserve game text.
To remember which cards have been played to your reserve in the current round, you may wish to rotate them, turning them back at the beginning of the next round.
Example: If you play Elrond to reserve, your carryover limit is increased immediately. If you later move or eliminate Elrond, your carryover limit is immediately decreased.
Likewise, The Reaver can be cycled the same round it is played to force each Free Peoples player to forsake 1 card.