Rift Cosmic Incursion. Rifts with values from to are included in the Cosmic Incursion reward deck. They can be played at the start of any encounter to retrieve up to the rift's value of any players' ships from the warp. If a rift card is stolen from a player's hand, the rift detonates and forces the stealing player to sacrifice ships equal to the rift's value.is a card type introduced in
New rifts appear in the reward deck from Cosmic Dominion, with values from to . In addition to retrieving ships, these allow players to draw cards or even establish new colonies. When detonated, these rifts cause the thieving player to discard cards or abandon colonies.
(From the Cosmic Dominion rules)
Rifts have two effects. First, a player may play a rift to receive a benefit of ships, cards, or a colony as stated on the card. Additionally, if a rift card is taken from a player’s hand and kept, either as compensation or as the result of another game effect, the rift detonates, causing the thieving player to lose ships, cards, or a colony as stated on the card. After detonating, a rift is discarded.
A rift will not detonate if a player's card or power causes a rift from his or her hand to be given to another player, because the rift is being "given" rather than "taken." Also, because the rule states "taken from another player's hand and kept," if a player steals a rift and somehow uses another card or power to discard it, give it to another player, or otherwise cause it to leave his or her hand right away, then the rift will not detonate.