The second of these two cards is Rin and Seri, Inseparable, which allows for a brand-new archetype in Commander that lets you play with a deck entirely composed of cats and dogs
This Omnath gets brought down simply because its so narrow compared to its contemporaries
It's main use is to be super fun with things like Well of Lost Dreams ("Instead of drawing this card, I'll gain life and also draw cards!") Sadly, you don't have blue in your color identity, so you can't play Drogskol Reaver, but for redundant copies of that effect, you do get Dawn of Hope once Guilds of Ravnica releases and even Lich's Mastery if you're crazy enough
Note that there are tons and tons of creatures with mana sink abilities that let you pump the creature up, whether that be Walking Ballista, Chameleon Colossus, or dopey creatures like Carnivorous Moss-Beast
However, Magic players have never really had a good incentive to build a deck with more than 60 cards outside of Battle of Wits
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