Last Minute Needs

Completion
First, speak to Sir Gnomeahad, who says:
 * "I'm feeling a bit out of sorts. I know what it is, my keen sense of danger must be telling me we need more defenses. Go put out some shields, would you?"

For the second part of the quest, just buy and place three Shields, which can be found under the Decorations tab in the Market for 525 Silver Coins each. If you have three in your inventory, you could just place these.