A HugOnePlayer card is a card that can help your opponents, but specifically it helps "target opponent / player" and not all of them unlike GroupHug cards.
Those cards are very helpfull if you want to play more politically, because you can rewards your opponents instead of only not hurting them (aka threatening). Also we play a lot of hidden partners in our playgroup as soon as we reach 5 players or more. In that game mode helping your partner (he'll still count as an opponent btw.) is quite beneficial for you as a team, or if you happen to be the teamless player you still can bluff your allegiance and strike in the right moment.
edhrec.com and scryfall.com both have no real way to search for these at the moment, so i'll start and curate this list. Suggestions are very welcome!
Not included are instants/sorceries that only say "Target player draws N cards", with no further effect, because they are easy to find and crowd up the list.
Fact or Fiction type effects are also not includes, yes they are awesome with a teammate, but they don't help your partner, they help you.
