Since damage remains marked on creatures until the damage is removed as the turn ends, nonlethal damage dealt to the equipped creature may become lethal if your life total decreases during that turn.
Prismatic Vista really shines here
If it is destroyed by any means and sent to the grave during your opponents turn, you can Special Summon it
Its a 2-drop, a mana dork, and it can attack and generate mana in the same turn
These are my favorite sorcery/instant draw cards lose life where that is a set number
If you choose not to give a gift, then Parting Gust becomes a slow blink that you can use to save your commander from a Farewell, stop a win condition of yours from getting Chaos Warpd, or even just for some extra value at the end of your antecedents second main phase