This is the recipe for crafting Pigsie (click here.)
One of the hardest parts is getting enough Pigsie TC. You can get them from the sources listed on it's TC version page (click here.) There are community groups that sometimes deal in trading rarer tc, but I don't know much about that.
You can also get the spell from the Loremaster and Wysteria Lore packs, but these are significantly more difficult due to the random nature or chance of actually getting the spell as a drop.
You can also get the item card version from certain gear. Of note is the Decade Piggle from the crowns shop that gives a Pigsie card at baby. (This item is going to retire from the crowns shop soon though if I remember correctly.)