Leyline of the Guildpact might not be the most powerful, but it gets the MVP award on this list because it fixes your mana in one card
When it was originally previewed, all I could think of was but it doesnt stop the trigger from happening to your opponent, you just copy it
Kardur, Doomscourge If youre playgroup has a problem with not attacking, do I have the solution for you
5 Grim Monolith Dont Look So Grim For just two mana you can generate three mana, making Grim Monolith a pretty darn good fast mana rock for Commander, but there are two things holding this card back
There are a lot of useful Rats you want to stick on the battlefield, and Swarmyard helps make your opponents require two removal spells if they ever want to take care of a Rat
Judy Hopps, Optimistic Officer, and Pawpsicle are a solid combo