Mechanically, it is more or less a rework of Rapunzel - Gifted with Healing from The First Chapter, carrying almost the exact same effect, but as an action card, and being potentially slightly less flexible in real play
This alone would make the card excellent, but the corrupted upside, which turns it into an unconditional exile effect once your opponent has three poison counters, pushes things over the top, making Anoint with Affliction an auto-include in poison-based decks, and a serious consideration in any deck playing Swamps
in the mid to late game, try to chip away at their life while incorporating King of the Pirates
Imagine doing Fact or Fiction with your creatures, equal to the amount of creatures attacking you - reminder, piles can be empty