Not as good as Cavern of Souls per se, but definitely serves in a similar role as that land does
The Lorcana Gateway box literally holds back cards (gating them, if you will) that add new mechanics in, and sets you objectives to complete before you can unlock the new cards and mechanics that go with them
It commands a premium over its siblings Articuno and Moltres, neither of whom appeared in Base Set, making it the definitive Legendary pull from the original run
You can tap any two untapped artifacts and/or creatures you control, including creatures you haven't controlled continuously since the beginning of your most recent turn, to pay the cost of Sunshot Militia's activated ability
Getting utility artifacts like Staff of Compleation into the bin can be especially effective, since they provide tons of utility
That creature deals damage equal to its power divided as its controller chooses among any number of those Wolves