Gavony Township and Oran-Rief, the Vastwood are lands that distribute counters to the team
You wont gain access to the extra mana Sol Talisman provides until turn four, but when it does, you can have at least six mana available to you, assuming you hit your land drops and didnt play any other mana artifacts, giving you a huge mid-game advantage over your opponents
This is because the Torture Pit side only tangentially synergizes with it
Overall, Planar Portal is a slow, value-oriented political deck with lots of card and mana generation to support its weaker color identity.
And just because I list it below doesn't mean it's going to show up any time soon
Similar illustration rare versions of Kanto starters are worth a ton from Pokemon 151 and I would expect the same out of these