Cult the Root

Use different traps to capture and maim paladins, villagers and possibly other creatures that are visiting nearby "holy" tree. But remember that they have to be alive so this tree can absorb their life force through its roots.

Buy and upgrade traps in middle level and use lever operated by Cultist Kronk that can be found on the first level. But remember that THE Tree dont like its food cold so take care not to kill sacrifices. Damage them just enough so they wont put up a fight. If they will fall undamaged then some cultists will die and tree will wither with no worshippers (GameOver).