Below is a walkthrough for the Use a Spell Seal task in Rune Factory 5.
Client: Livia
Objective: Use your Spell Seal to catch a monster
Reward(s): 7500G
After accepting this request from the Task Board, Livia will show up and task you with using your Spell Seal on a monster. Exit the town via the eastern gate then follow the path south towards the Whispering Woods. You will come across a few monsters here. Use your spell seal on them until you capture/befriend one then return to the Task Board to complete the task.
Notes:
- This task might not show up on the Task Board until after you have a Monster Barn.