Beyond that, Aerodactyls attack that only required colorless energy meant that this mon could be slotted into almost any deck to hose the major strategies of the time
It creates its own fodder, though you'll want to rely on other token generators to copy something other than 1/1 elves
In addition, the ability allows you to dispatch the attack at every turn, with the naturally accruing energy from the energy zone added to the ability energy
However, that was just reprinting six cards, and there are hundreds of new cards in the 40k commander decks - not to mention that the Astartes, Necron and Tyranid creature types are part of Games Workshop's intellectual property, so presumably can't be reused without their license.
Belzenlok is not one of those commanders whose necessary for the deck to work, but when used at the right time can really accelerate your board
You dont need too many other Shrines to make this one have long-term benefits that outweigh the expense of playing it