Heal Delivery is a Kindness deck specific effect card. It almost fully heals you, but will fully heal your monsters, alongside removing all negative effects, such as KR, Paralyze and lowered stats. This makes Heal Delivery work exactly like Asriel and almost like Asriel Dreemurr.
It's not recommended for those with heavy hitting Kindness decks. It's suggested that you don't use straight away and only when you're close to losing in order to get the full surprise advantage.