For the 2021 season, all cards with the D regulation mark are legal to use in tournaments
His ability isn't exactly unheard of as far as attacking creatures go but as far as I know the blocking portion he brings to the table is pretty unique
In fact, it's a hate card for other utility lands, shutting down activated abilities that aren't mana abilities and letting them tap for colorless instead
Some creatures, like Grave Researcher and Emeritus of Ideation, can prepare themselves once conditions are met
For one-off edge cases, its usually faster to use a generic token, a dry-erase token, or a spare card in a sleeve
If you do, let me know how you get on