Thats due to all the different ways there are to make lands tap for extra mana, which makes Candelabra's untap ability a type of mana doubler with even higher potential
The goblin synergizes with Pact Tactics, an AFR flavor word mechanic, and is a good holder for Goblin Morningstar
Were sure your top 10 would look very different, but here are our 10 best Humans for Commander Honorable Mention: Rick, Steadfast Leader This card is getting an honorable mention because, whilst very powerful, its also very contentious
There are a few mechanics which really boost the decks ability to chain-cast spells and get either commanders ability rolling earlier, which is nice for a precon which lacks the kind of fast mana sources you usually find in this kind of deck
Or if youre playing aggro decks, you could win before you have to worry about losing the game
Once your side of the table is overrun with elves, her second ability slams the door shut, tap 10 untapped Elves and each opponent loses 10 life while you gain 10