Fear My Authority

(An ongoing scheme remains face up until it's abandoned.) Creatures you control get +2/+2 and have fear. (They can't be blocked except by artifact creatures and/or black creatures.) At the beginning of your upkeep, abandon this scheme unless you discard a card or pay 3 life.

From Magic: The Gathering.

Open the interactive version on https://mythscribe.cloud/app/tcg/cards/cms6onlrxh877pb1hrfgj60p7.