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At the beginning of your upkeep, if you control a creature with power 4 or greater, draw a card.
If you don't control a creature with power 4 or greater as Colossal Majesty's ability resolves, you won't draw a card.
If you don't control a creature with power 4 or greater as your upkeep begins, Colossal Majesty's ability won't trigger. You can't take any actions during your turn before your upkeep begins.
The creature with power 4 or greater that you control as Colossal Majesty's ability resolves doesn't have to be the same creature with power 4 or greater that was under your control as the ability triggered.
You draw only one card, no matter how many creatures with power 4 or greater you control.
