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You summon the energies of the Old Kingdom Spell Power Word and project them at a shelf of loose rock that overhangs the crevice. It shudders as the concussive energy of your spell slams into it. Moments later it collapses and comes crashing down, severing the rope like a guillotine as it tumbles past the crevice to disappear into the gorge below.
As the floor of the bridge ceases to sway, you quickly remount your horse and coax him across to the far side. You can hear angry voices echoing from the gorge as you spur him to the gallop and escape along the jungle trail that continues beyond the bridge.