@Fuko you just reminded me of a time I was GM'ing a Deathwatch RP, and my friend used that clip to illustrate how he alerted an entire horde of Tyranids to the party's presence.
Thank you very much
He got tons of XP and felt a recoil?
Like freezing the desert would have killed lots of monsters underground + big boss "chief/father" monster.
Or did he restore the desert to original (lush green fields) state?