Glorious Sunrise's third mode may be chosen even if you don't control any creatures with power 3 or greater as the ability goes on the stack. If you control a creature with power 3 or greater when it resolves, you will draw a card. If not, it will do nothing as it resolves.
At the beginning of combat on your turn, choose one —
• Creatures you control get +1/+1 and gain trample until end of turn.
• Target land gains ": Add " until end of turn.
• Draw a card if you control a creature with power 3 or greater.
: Add