Any wild that lands on reel two, three or four grows to cover its whole column before lines are read. Wilds are rarer in these halls because each one is worth so much more.
Wilds that fill a whole reel
Expanding-wild halls change the reels before anything is paid. A wild on one of the middle three reels turns the entire column into wilds.
Two or three expanded reels can connect many lines at once, which is where these halls find their largest results. The same rule applies during free spins.
Worked example. A wild landing on reel three becomes three wilds stacked down that reel, completing any line that matches on reels one, two and four.
