“ This nocturnal creature resembles an over-sized bat, with the mouth of a star-nosed mole.
The Manabat can be as small as a normal bat, but can grow to a size larger than a human.
This creature is feared by wizards and other magic users, as it feeds of it victim's mana.
It will hide at day and hunt at night, swooping down on its prey, engulfing the magic user's face with its slimy tentacles, thereby sucking the mana from the victim. Depending on the size of the Manabat it can drain only a portion of the wizard's mana, which he will regain in a few hours, whereas the largest creatures will drain the wizard's mana permanently, rendering them ineffective as magic users.It will not harm them in any other way.
Manabats behave like normal bats and breeds in same way and numbers.
They can be tamed by a master trainer to attack on command.”
“ On a location with numerous webs, and at least one big spider, there is a something inside a cocoon. It is humanoid in shape, still moving. If the heroes free it (not before they kill or drive away the spiders), they meet a ... zombie!
The poor zombie wandered the dungeon alone, and tried to kill a big living creature (= a spider). The spider used the usual treatment, even if this victim did not look tasty. The zombie can be easily killed as any other zombie. It got but several doses of spider-poison, so can be something worth if it is extracted. You can mention to a druid or ranger the fact the spider had no poison anymore.”