This ability can't be copied and X can't be 0. (Mana abilities can't be targeted.)
With Fierce Guardianship, you can tap out to play your commander without fear of it dying immediately to a wild Doom Blade
For example, while it's in your graveyard, Questing Druid is a green creature card whose mana value is 2
A few years down the line, all colors will have all of these staple vanillas for most costs plus a few standard-cost draw cards and some others But for now, printing everything in one set would make the set very boring
The upgraded deck really puts a focus on capitalizing on your cards whether they are face up or face down, and is a healthy step away from the landfall themes we see with so many other Simic commanders
On the other hand, its growth plan is powerful but predictabl e, and opponents who keep the board clear can blunt its impact