Oh! Why would you need another priest, when you have Day? XD
Anyway, this quest chain will lead to Emerald Shield:
Saliko Village
- A Bouquet
- Field Trip to the Plains
High Plains
- Orchids of the Plains
- Sugar and Treats / Sugar and Treats II
- Ensuring the Survival
When you complete that last quest, follow the monster that you just helped, and you will obtain a scroll and a new quest:
- The Strange Scroll
- The Strange Scroll II
- Blessings of Nature
Completing "Blessings of Nature" will award you Emerald Shield Level 1.