Random card generator gave me Painful Memories and Angel of Salvation. Sometimes, I just don't do what I should because I got an idea that excites me more. This card is missing both a discard element and a damage prevention element. But what would I have done with that? Made a player put five cards from their hand on top of their library? Prevented the player from making you discard up to 5 cards? This card seems more fun to me, and is a clever use of convoke, so I'm sticking with it.

I think it's very sensible to do some mashups like this. If you look at the mashups on the Goblin Artisans blog, some of them take barely anything from one of the cards being mashed. This took the "top of library" idea from Painful Memories, which I think is enough.

Templating sadly needs to be a bit more fiddly. "...you may return up to five target creatures you own and/or creature cards in your graveyard to the top of your library" might work. See Rise // Fall for a similar template.

Oh, and the name Angel of Mercy is taken.

Poo. You're right. Angel of Mercy was too obvious a choice for a Magic card, I suppose. This time, I'll go for a name that indicates the patron saint that protects you from painful memories.