In that case, Clever Impersonator enters the battlefield as a 0/0 creature, and it's put into the graveyard immediately (unless something is raising its toughness above 0)
With the exception of Kronk, this deck caps out at four-cost cards
Doubling counters is a very dangerous ability, especially when it costs no mana as it does here.
A player completes a dungeon as that dungeon card is removed from the game
Instead, each of the "face" legends in the Commander decks will be traditional foil borderless cards
This makes the spell either easier to cast in the case of regular hybrid mana like found on Shielding Plax or gives you access to a card if your mana doesnt quite match the colors, like Gurmag Nightwatch, where you can pay two generic mana instead of one color