That said, there is an audience that wants to see incentives to play the fewest colors in Commander and those kinds of answers are not going to be properly seen in a Standard-legal product
Its sacrifice ability costs two mana, which significantly limits how much you can use it if you also want to cast spells in the same turn
While its plenty powerful, its the effect on perceived barrier-to-entry that really posed a problem because casual players watching Commander games in passing could reasonably assume that they needed hundreds (now thousands) of dollars in Power-9 mana as table stakes, just to join the format
They provide a good base for any new player excited about the format and had a fairly high value at the time compared to their MSRP
Fortify Fortify appeared on Darksteel Garrison, the only card with the fortification subtype
[30] For example, let's say that Kavu Mauler is attacking and Bonethorn Valesk decides to block it