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Rulings
Nasty Little Rabbit's ability will check at the start of your beginning of combat step to see if you control a creature with power 4 or greater. If you don't, the ability won't trigger at all. If it does trigger, the ability will check again as it tries to resolve. If you don't control a creature with power 4 or greater at that time, the ability won't resolve.
Rulings
Nasty Little Rabbit's ability will check at the start of your beginning of combat step to see if you control a creature with power 4 or greater. If you don't, the ability won't trigger at all. If it does trigger, the ability will check again as it tries to resolve. If you don't control a creature with power 4 or greater at that time, the ability won't resolve.
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