One location might grant bonuses to characters when they visit that location - how this works is a mystery, for now - while another might bestow passive benefits as long as it remains in play
As they get revealed, well update this article with complete decklists as well
I see all five of these cards as solid includes, I just find it easier to justify making space for Lair of the Hydra and Den of the Bugbear in a Cube as well as those two being higher picks in the average draft
White gives us Ajani Steadfast, which can ramp loyalty not only on Teferi, but all other Planeswalkers too
At every playtest of the decks, I would get feedback about coworkers favorite characters, story moments, etc
In other words, I recommend you keep an eye out for Ulamog here in your MH3 packs