[Magiclysm] Sacrificial Regrowth / Renewing the Forest rework

[Standing-Storm]

Summary

Mods "[Magiclysm] Sacrificial Regrowth / Renewing the Forest rework"

Purpose of change

Working on #78525 and noticed that the linked issue was right--no one ever casts Sacrificial Regrowth and Renewing the Forest is better in basically every single way, so time to bring them a bit closer together.

Describe the solution

Make the hp cost of Sacrificial Regrowth progressively lower as it levels, from 25 at level 0 to a minimum of 10.

Add an hp cost to Renewing the Forest. This is done through EoC since there's no way to do a full-body hp cost, so it takes 30 - (level / 2) from each body part. If you don't have enough HP, the spell simply fails. The hp cost is deducted after checking that you're outside on Z level 0, so you'll never lose hp and then be told "sorry, you can't cast that here."

You can of course cast Renewing the Forest and then heal yourself with druidic magic and cast it again, but you could do that before with Sacrificial Regrowth so I don't think it's a big deal.

Describe alternatives you've considered

Testing

It works.

Additional context

My conception for spells like these (and the ritual spells that grew the giant tree druidic tower) is that they were usually cast with multiple participants to increase the effect and spread the cost among the casters. But you're all on your own, so some things are harder and some things you can't do at all.