This challenge is currently uncompletable because of the changes to the card Smite, causing it to be impossible to recreate your opponent’s board.
Normally this challenge would be solved as follows:
- Hit your left River Crocolisk into centre Chillwind Yeti
- Heal opponent’s right River Crocolisk
- Smite your right Chillwind Yeti
This does not resolve the challenge however, as your Chillwind Yeti will be 1 point too damaged.