
Kydeem de'Morcaine |

Last week our very low level part was attacked by a large swarm of bats. We were actually taking a fair amount of damage and having a hard time hitting them in the air.
All I had to use was a grease spell. I reasoned that a bat covered in grease probably can't fly. At least long enough that we can stomp on them. The GM agreed and that took out most of them except for a few that made their reflex save.
Does that seem like a reasonable ruling to all of you?
I am not complaining, just checking on other opinions.

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Last week our very low level part was attacked by a large swarm of bats. We were actually taking a fair amount of damage and having a hard time hitting them in the air.
All I had to use was a grease spell. I reasoned that a bat covered in grease probably can't fly. At least long enough that we can stomp on them. The GM agreed and that took out most of them except for a few that made their reflex save.
Does that seem like a reasonable ruling to all of you?
I am not complaining, just checking on other opinions.
It is reasonable to me. The GM didn't want to kill the players.

arioreo |
It's a good and creative way out of a problem situation that was unsolvable in an other way (or atleast, that's what I understand from your post) though it's in disagreement with the rules.
The idea of swarms is that there are a very large number of opponents. Too many for a low level grease spell to affect. It's just like with a sword attack, you may be able to slice some of the bats in half though for the totality of the swarm, it's meaningless and has no effect.
Honestly, I think the better solution for the DM would have been to make the bat swarm flee. I see very little reason for a bat swarm to protect their lair. Atleast on the nature documentaries I've seen, the bats always flee.

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Last week our very low level part was attacked by a large swarm of bats. We were actually taking a fair amount of damage and having a hard time hitting them in the air.
All I had to use was a grease spell. I reasoned that a bat covered in grease probably can't fly. At least long enough that we can stomp on them. The GM agreed and that took out most of them except for a few that made their reflex save.
Does that seem like a reasonable ruling to all of you?
I am not complaining, just checking on other opinions.
I am of the opinion that if it helped move the story along for that encounter, go for it.
But, for the RAW, here is the part of the swarm trait that comes into effect:
A swarm is immune to any spell or effect that targets a specific number of creatures (including single-target spells such as disintegrate), with the exception of mind-affecting effects (charms, compulsions, morale effects, patterns, and phantasms) if the swarm has an Intelligence score and a hive mind. A swarm takes half again as much damage (+50%) from spells or effects that affect an area, such as splash weapons and many evocation spells.
And here is the grease targeting info:
Grease
School conjuration (creation); Level bard 1, sorcerer/wizard 1
Casting Time 1 standard action
Components V, S, M (butter)
Range close (25 ft. + 5 ft./2 levels)
Target one object or 10-ft. square
Duration 1 min./level (D)
Save see text; SR no
A grease spell covers a solid surface with a layer of slippery grease. Any creature in the area when the spell is cast must make a successful Reflex save or fall. A creature can walk within or through the area of grease at half normal speed with a DC 10 Acrobatics check. Failure means it can't move that round (and must then make a Reflex save or fall), while failure by 5 or more means it falls (see the Acrobatics skill for details). Creatures that do not move on their turn do not need to make this check and are not considered flat-footed.
The spell can also be used to create a greasy coating on an item. Material objects not in use are always affected by this spell, while an object wielded or employed by a creature requires its bearer to make a Reflex saving throw to avoid the effect. If the initial saving throw fails, the creature immediately drops the item. A saving throw must be made in each round that the creature attempts to pick up or use the greased item. A creature wearing greased armor or clothing gains a +10 circumstance bonus on Escape Artist checks and combat maneuver checks made to escape a grapple, and to their CMD to avoid being grappled.
So, you cannot coat a swarm of bats with grease, due to the following:
a) bats are in flight and not on the ground that is covered in grease.
b) a swarm of bats is not an object and thus not a valid target to be coated itself.