User blog comment:IronC/Using SR rarity as a Metal Slime replacement./@comment-75.84.136.6-20150323022241/@comment-25287728-20150323035949

Yes, under normal circumstances those would be the steps. If you dont have a Slime card, you can use 10 N cards instead with both arcana to level the SR to 20. You should probasbly check with your alliance about the SR card you plan to use beforehand if you're still new, just in case the card may be useful to you.