Will, Scion of Peace doesn't contribute to this directly, but lifegain comes in large chunks, which converts to a sizeable portion of mana you don't have to spend on something like Sphinx's Revelation
Simple really just kill em
Where to find it: Outlaws of Thunder Junction Booster Packs in The List Slot 3
So for those of you/us that love the political game that intangible ability to convince your opponents you're not the threat, or make them protect you and would like to deck build around this key aspect of multiplayer, I've got some commanders you may want to consider
Juvenile Gloomwidows wither helps you to (slowly) get around indestructible creatures, but its mostly here as a cheap early creature
This isnt unplayable, but its a bottom of the barrel quality common