A maneira mais rápida é criar ritualmente um reduto com um ritual de nível 20. Supondo que você não tenha os níveis para isso,
As notas do artigo:
If buying or seizing a stronghold doesn’t fit with your plans, you can build one from scratch. Doing so doesn’t cost any more than buying one. It does take time, though. Considering that a community might spend decades building a cathedral or a castle, don’t expect to move in right away. Even in a perfect scenario, you need to rely on the availability of local materials and labor. This situation gets worse if you make an artful decision and place the stronghold in a ridiculous spot, such as clinging to the side of a mountain or on a remote and barren island. Depending on what you want, it could take 1d10 + 5 months to build an impressive wooden structure such as the longhouse illustrated in this article, to 1d10 + 5 years to build a stone castle or cathedral from scratch. Extra time can be tacked on for extremely difficult projects.
O artigo fornece o seguinte ritual:
Bigby’s Construction Crew
Level: 15 Component Cost: 5,000 gp Category: Creation Market Price: 20,000 gp Time: 24 hours Key Skill: Arcana (no check) Duration: Permanent
A veritable army of magical hands appears in the air around you, each armed with tools appropriate to the task to which you set them, from carpentry to masonry. When you perform the ritual, you describe the desired construction in great detail. ... You can use this ritual to build a stronghold whose constructed space does not exceed 300 squares. That space can be divided and arranged any way you please but must be contiguous.
Níveis mais baixos têm um tempo muito mais difícil, já que a ideia de manipular o terreno é algo melhor manipulado em um desafio de habilidade do que mecanicamente.
Minha recomendação, se os jogadores não querem uma fortaleza, é transformá-lo em um desafio de habilidade estendida, com cada sucesso em arcana, geometria, história, natureza, roubo, etc., fornecendo alguma característica interessante que eles pode explodir / usar mais tarde na batalha de defesa épica esperada. Cada falha desperdiça tempo ou recursos.