Group hug is a lot of fun for everyone until it turns into group thug
If you're unfamiliar with the mechanic - once you pay the encore cost, you exile the card from your graveyard, and for each opponent, you create a token copy that attacks that opponent
Commander precon, which combines energy and artifact synergies into one
There is one exception to this rule, though: Commander
Brawl Not Legal Vintage Legal Timeless Not Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Not Legal Toolbox Buy This Card Notes and Rules Information for Auron, Venerated Guardian: You don't choose a target for Auron's last ability at the time it triggers
For example, Magic: The Gathering 's Spider-Punk card has the potential to cause a lot of chaos on the field