Blasmophet, the Insatiable Hunger

Unique is a static ability keyword. It is not related to the deckbuilding concept of uniqueness.

Uniqueness is determined by a card’s moniker. For example; Blasmophet, the Insatiable Hunger token and Blasmophet, Levia Consumed (the demi-hero) are considered to have the same moniker (Blasmophet). Cards that do not have a personal name do not have a moniker, and do not interact with Unique (e.g. Shadow of Blasmophet).

If you control more than one card with unique and a given moniker, you will remove cards one by one until you either control only one card with unique per moniker, or until no card with that moniker and the unique keyword remains. For example, if you control a Blasmophet, the Insatiable Hunger token and then create an additional Blasmophet, the Insatiable Hunger token, you will clear one of the tokens as a game state action.

If a card with a moniker and the unique ability shares that moniker with a card without unique, then the game state process of clean up above occurs. For example, Blasmophet, the Insatiable Hunger token and Blasmophet, Levia Consumed have the same moniker, and you will clear cards by the process above. If cards cleared in this way have the property, then they have died for the purposes of game effects, but are not considered destroyed.

If you would come under control of two cards with the same moniker and the unique ability while under an effect that causes cards you own lose their name property (e.g. Amnesia), none of these would be cleared as part of game state action because they don’t have a name property that is required to determine uniqueness. However, if they regain their name properties later, then one of them would be cleared as a game state action.