The Wall of Iron spell is an example of how I am doing this.
The original spell was written by +Matt Finch like this.
Wall of IronMagic-User, 5th LevelIn a recent game, a certain dwarven rune-caster came up with a innovative way of combining a dimension door with the wall of iron to take out a dragon and its rider that was plaguing the party. Because of this my version of the spell now reads.
Range: 60 feet
Duration: 2 hours
The caster conjures an iron wall from thin air. The wall is 3 feet thick, 50 feet tall, and 50 feet long.
Wall of Iron
Magic-User, 5th Level, Range: 60 feet, Duration: 2 hours, Art: Hearth
This spell will create an iron wall within 60 feet of the caster. This wall is 3 feet think, 50 feet tall, and 50 feet long. At successful Thaumatology ability check of 15 or better will allow the caster to position the wall in such a way that it will fall onto a target. The slab of iron will do 30d6 damage to the target plus 1d6 per 10 feet it has fallen.
Since the original publication of the Majestic Wilderlands in 2009, I have dozens of these types of ruling and plus other tweaks to how I run things in my setting. So now is the time to combine them into a formal rulebook. Hopefully in a form that makes it easy for folks to cherry pick what they want for their campaign.