Change "your upkeep effect" to "At the beginning of your upkeep,"
Replace 'your upkeep effect' in scripts
Allow 'you may' for mid-ability options
Replace 'you may pay <cost>. If you don't, sacrifice SN' with 'sacrifice SN unless you pay <cost>.'
Re-syntax scripts for 'sacrifice SN unless you pay <cost>'
Replace 'your end step effect' with 'At the beginning of your end step,'
Replace 'end step effect' with 'At the beginning of the end step,'
Replace 'dies effect' with 'When SN dies,'
Re-syntax scripts for 'When SN dies,'