Triton Shorestalker, Slither Blade, and Mist-Cloaked Herald are just a few, with Shoreline Looter being the best unblockable creature as it'll give you card draw as well
Its just a little slow to get going, needing you to pull out as much mana as possible in early turns to be able to start slinging those big spells
If the chosen permanent is a token, Malleable Impostor copies the original characteristics of that token as stated by the effect that put the token onto the battlefield, with the listed exceptions
If youve played against them once, youve played against them all because the small differences in iteration between anyones list for these decks can be so minute youd feel like youre playing against a stock list
Valgavoth is one I upgraded since purchasing, as I felt it really did need cards like Deflecting Swat and Bolt Bend to use the Commander as win condition