I recall seeing someone post that they wish sorcerers had an easier way of getting mana because sacrifice is so marginal.
I personally think sacrifice could merely be tweaked. And we had a really productive brainstorm about it maybe like 18 months ago, or 2 years ago, before Evarin quit anyways. But of course, no GM participated or acknowledged us and so, I think those ideas are probably gone now.
So… here is the spell.
A reverse mana node. Instead of increasing mana return for everyone in it, it DRAINS mana from everyone in it. Except the caster or those grouped to him.
The drained mana, of course, going to the sorcerer. How much is drained and recovered being then based on mana control skills.
Additionally, the deadpool corrupts the essence of the entire area partially, making any non 700 circle spells not cast by the caster group have a chance of failing as if the caster had 703 cast on them. Base the chance on lore or mana controls or something. I could give it a pretty significant chance though.
If you’ve read the ever-so-ponderous Wheel of Time Books… (and it has been a few years for me) like that one dirty place where the source is corrupted.
Additionally, I could see any 700 spell cast (including by critters) To have a CS boost, while in the deadpool.
Finally, the pool would break any sanctuary when cast, and prevent new ones from going up while active.
Call the spell, magical poison.
Addendum - the downside of deadpool is that you’re spending 50 mana to make a spot you cannot move from, modern hunting techniques typically involve almost no such camping, so that is the downside. Though, it would be interesting if we could cast the deadpool, and then walk away from it while still be “Beamed” the mana it drains (maybe less, at distance, and of course the CS boost etc would no longer apply). Like how we can 701 something and walk away and still get blood. Such a feature is worth discussing. I could also see it limited per day like how 1150 and 350 are. Definitely though, each sorcerer should only be allowed one active deadpool at a time. And yes, casting it in town would generally be a bad thing - though having the constable arrest you for such would seem like bad comedy. Does he really understand high level magic like that? It’d be far more better (yes, more better) if you got tossed in a guild jail by someone from the guild for doing that sort of thing.
Addendum 2 - a nice ability for a new major demon could be a walking deadpool, whereas they permanently have one that of course follows them wherever they go.