| Vemnic |
Unfortunately, rods from god won't be coming from wall of stone. Or at least you can't create them there. Because, wall of stone states...
This spell creates a wall of rock that merges into adjoining rock surfaces.
However, there may be a way to achieve a similar effect from the ground using teleport. Use an immovable rod to mark a location over the target, summon an elephant. Load it to it's max carrying capacity. polymorph your elephant into a fish. teleport your elephant below the rod. dismiss your polymorph on the way down. Even if the DM rules that the elephant disappears before transferring it's momentum, the stuff the elephant was carrying can be unloaded in the air.
Unfortunately, even that won't be too impressive as the system has a built in max fall damage of 20d6. It's much better for damaging structures than enemies. You only need to be about 200 feet in the air to drop bricks that each take 20d6 when they hit, presumably transferring some amount of damage to the structure in return.
Seems more useful honestly as an inciting incident for the players. They walk out of a tavern to alchemist fire laden bricks falling from the sky with no enemies in sight to kill. Then one smart player pulls out a spy glass and climbs a roof to finally spot a squad of flying assailants ridiculously high in the air unloading objects from large sacks over the city.
Air superiority is vastly underutilized in campaigns.
OK, So here is my Idea.
We need a Conjuration (Creation) Wizard with a Amulet of Adaptation and the spell overland flight.
First you challenge your target to a fight in a area where your enemy will contrast with the surrounding terrain, then you fly up into orbit.
Once in orbit you cast wall of stone spells and major creation spells to drop large rocks and metal pillars from orbit.