Dominating both Modern and even more Legacy, the card is an all star answer for anything your opponent is doing, almost changing the way decks being build preboard
[7] Examples include things like: If you target Logans Sun Titan with your Pacifism, we can take him out next turn if we both attack. If you wait to cast your sweeper for a turn I can take out Nancys Liliana of the Veil, which benefits both of us. You cast a Councils Judgement and say, Lets all agree to target Nickys Ghostly Prison so we can stop getting taxed, okay? Sometimes, you just want to do something cool
It works wonders in goblin decks, since those are very numerous by nature when you have a goblin commander like Krenko, Mob Boss churning out tokens
Opponents would need to have a high damage-dealing character on the table, ready to challenge, or a card like Along Came Zeus to deal enough damage to banish Robin Hood, Daydreamer