For just three mana, this enchantment can hit the battlefield early in a game and snowball quickly
This card is excellent in any Death and Taxes-style deck with Stoneforge Mystic and pairs nicely with token producers such as Sai, Master Thopterist, but the ways to abuse Skullclamp are plentiful
By tapping it and any other untapped permanent you control, you get one mana of any color
There are plenty of spells that offer one mana for two damage or two mana for three damage but there are fewer that do four at two making it that bit more unique
In order to make the list, the commanders had to have less than 500 decks on EDHREC at the time of writing
Hallowed Moonlight is going to have to see significant standard play to maintain its $5 pre-order price like main deck, four-of type play, and I'm not sure this is likely