
DeathtouchDeathtouchAny amount of damage this deals to a creature is enough to destroy it., hastehasteCan attack and use tap abilities the turn it comes under your control.
When Queen Marchesa enters, you become the monarchthe monarchThe monarch draws a card at the end of their turn. A player whose creature deals combat damage to the monarch becomes the monarch instead..
At the beginning of your upkeep, if an opponent is the monarchthe monarchThe monarch draws a card at the end of their turn. A player whose creature deals combat damage to the monarch becomes the monarch instead., create a 1/1 black Assassin creature token with deathtouchdeathtouchAny amount of damage this deals to a creature is enough to destroy it. and hastehasteCan attack and use tap abilities the turn it comes under your control..
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Read from the rules text. A card that enables a keyword makes or is the thing; a card that rewards it gets better when you have it. Two cards interact when one enables what the other rewards.