Well, for a lot of color pairs it offers a crucial, extra typed dual land that also has a little bit of card advantage stapled to it, as a treat
Akroma's Memorial is much more expensive, costing seven colorless mana, but also gives your creatures flying, first strike, vigilance, trample, and protection from black and red
Monowhite can run the Felidar Guardian + Restoration Angel infinite loop, and it gets even sillier with Elesh Norn, Mother of Machines to double those ETBs and bring Bill along for the ride
If you're not constantly sending creatures into battle, the deck's doing something wrong
A 6-mana creature that must survive a turn cycle to have an impact doesnt line up with the current format, especially since this elder dinosaur can whiff
When I write these articles, I go to our database and look up the history of the card (and often talk to the set lead designer)