Phantom Rework

Phantoms usually are just pests with no reward...
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But now there is one!

Every 3 days, phantoms will grow in size and power, but also increase the reward you get, that being
PERMANENT ABSORPTION (at least until you lose the hearts to damage)
A day before the first phantoms start spawning, invisible, harmless phantoms will spawn as a warning.
This caps at 12 days, and applies once you sleep.

Bigger phantoms will also be able to drop more membrane.

Along with this, phantoms will get stunned for three seconds if you block them with your shield, so you can actually deal large damage to them.
They will also instantly disappear when lit on fire.