These days, creatures hidden under the Mask are always cast as 2/2s without any abilities, just like any other face-down creature, which leads to a few strange interactions one might argue goes against "the spirit of the card"
Kira, Great Glass-Spinner : This card acts as a powerful protective umbrella for your creatures, granting them a shield against the first targeted spell or ability an opponent casts on them each turn
Most games come down to creature beatdown to get the opponent to 0, and many creatures have effects that are far more powerful than just some stats
Im actually surprised that I dont see this card more often in Commander because its equal parts efficient and effective
The Best Card in MTG history is Lurrus of the Dream-Den before the Companion Errata
Even better in a Daxos the Returned deck where you can trigger it on each players turn