It becomes useless but stays on the battlefield if the chosen player leaves the game.
You gain control of each creature chosen this way, and they gain "This creature can't attack its owner." Then for each aid vote, put a +1/+1 counter on each creature you control
Let me show you how to execute the perfect Trade
Sacrificing five creatures sounds like a lot for a tutor, but one Fleshbag often kills three or four creatures, and Lagomos provides free sac fodder on its own, even if you cant make the tutor ability work
The cards arent covered by the comprehensive rules and are not for tournament play, notably different from being not tournament-legal. While it's true that silver-bordered cards arent legal in any Standard, Vintage, or Modern decks, Wizards still intended them to be used in casual black-bordered formats rather than exclusively with each other