He'd be fairly underpowered without hexproof, which is an amazing ability on a commander
After all, you can use Eerie Interlude to save all of your creatures from imminent destruction, but you can also simply include this card in a deck that's chock-full of creatures with enter the battlefield effects
For example, if you cast Photon Blast Barrage (a sorcery with mana cost ) and choose 2 as the value of X, its mana value is 4
Moseo, Vein's New Dean Moseo, Vein's New Dean is sneaky powerful, and once the right brew is found is likely to be the key card in a very good Standard deck
Smile at Death I see what you did there Wizards, an enchantment named Smile at Death that plays similarly to Alesha, Who Smiles at Death
You also can't play a million tricks though, as you need creatures for your deck to work, so I don't think you can play both