Do I want to attach both Warhammers or use the extra mana to activate my Collosus one extra time
Also, there are always ways to build decks in colours that dont make sense, there are a few Blue Aggro decks, but it isnt a common thing, and you shouldnt be trying to break the mould with your first deck
Key Commons and Uncommons 2x2 has such distinct archetypes that the best card for you will often depend on the strategy that you're pursuing
Prosper, Tome-Bound and Laelia, the Blade Reforged are two commanders that will benefit immensely from this effect, and will likely show up in a lot of their decks
With Abyss Proxy Shop, you can play with Hare Apparent and every legendary Commander staple you need all without spending a fortune
That alone is remarkable, but Commander players have found ways to make this life drain effect even stronger in Commander, such as in white-black decks