Possession, Revised Action, $6P
If this is the first time you played Possession this turn, for each card the player to your right gained in their most recent turn, you may gain a card that costs the same or less.
The problem with Donald X’s original suggestion is that it still allows for stalemates when both players can play multiple Possessions per turn. Thus, the once per turn restriction. I also added “you may” so that you don’t need to gain coppers or the like if you don’t want them for your deck.
Possession II: Action, $6P
For each card the player to your right gained in their most recent turn, gain a card that costs the same or less.
