Antilife Shell and Movement

[The_Hanged_Man]

Antilife Shell has the following rules:

Spoiler:

You bring into being a mobile, hemispherical energy field that prevents the entrance of most types of living creatures.

The effect hedges out animals, aberrations, dragons, fey, giants, humanoids, magical beasts, monstrous humanoids, oozes, plants, and vermin, but not constructs, elementals, outsiders, or undead.

This spell may be used only defensively, not aggressively. Forcing an abjuration barrier against creatures that the spell keeps at bay collapses the barrier.

My question is at which point in practical terms does forcing the barrier against a creature cause it to collapse? Is it only against "monsters"?

The reason I am asking is because in strict terms there is always going to be some sort of "life" that will be in your way. Does a single blade of grass stop you? What about some inanimate bushes or trees? A mosquito? Airborne bacteria? A mouse? Where do you draw the line?

Thanks!

[thepuregamer]

I am not certain but I believe that when the spell refers to plants, they are referring to creatures of the plant type. This is a safe conclusion to make since that entire sentence references all the creature types.

Thus a blade of grass would not pop the shell since regular plants are not included as plant creatures. Also bacteria does not seem to be referenced as being pushed out so they would also not pop your shell. But a mouse would definitely pop it and a mosquito might as well.

plant type wrote:

Note that regular plants, such as one finds growing in gardens and fields, lack Wisdom and Charisma scores and are not creatures, but objects, even though they are alive.