Consider the Looter a Compulsion that costs no mana to activate a huge distinction
I played lands, creatures, got my commander out and proceeded to swing every turn so I could dig into my library
MTG Commander deck building ratio: How many lands, creatures and other cards you should include in your Commander deck
Of course, good will alone wont win you the game, so Font of Mythos will only be a good fit in decks that know what to do with the extra cards they draw (or how to punish foes for being flooded with cards)
Font of Agonies When Ravnica duals enter the battlefield, you can pay two life
Ruinous Path and five mana sweepers will be the most common removal spells against a huge creature like this, and they arent caught by the even number clause