25 motif challenge is Two Hearts in One by Martha Ess. I'm not sure where I actually found the pattern, since I can't find it again to give you a link! I have the first round more or less right, and I managed the split chains to get to the second round, but not far along there I have made an irretrievable muddle! The pattern shows the two hearts individually at the end, I'm thinking of tatting those first, just to get the hang of the structure of the hearts before I try to intertwine them. Plan B required, anyway. But it wouldn't be a challenge if it was easy!
I used some of the thread I cut off to tat Grace Tan's "Jane's Bookmark Cross' - a lot easier than the intertwined hearts!