The current characteristics of the leveler, and the number of level counters on it, are not
The effects from Tenth District Hero's abilities overwrite other effects that set power and/or toughness if and only if those effects existed before the ability resolved
That final ability is that whenever he deals combat damage to a player, you may pay five and if that player has 10 or less life, they'll lose the game
Mint condition Black Lotuses have routinely sold for hundreds of thousands of dollars, but a private sale between Pristine Collectibles and a mysterious buyer earlier this year had a sticker price of $3 million
I chunked Faerie Duelist as a trick that gives -2/-0, and in so doing, forgot that it has an additional restriction
Overall I like the card and I think in this deck it will work fine