Sporesweeper

If you're pet class - pets do not count for this so it's safe if they get hit by explosion

There are two fungarian delves available to complete this achievement:

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• Fungal Folly in Isle of Dorn
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• Mycomancer Cavern in Hallowfall
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Just to clarify: Touching the spores and "activating" them, does not null the achievement. Only get hit by them after they've been "activated" does. So don't panic if you activate them. Just run away. Plan each step carefully and look for a "run to" points in case you activate a spore. Ignore any nodes or bonus XP. Slow and steady. Plan ahead. As mentioned in other posts, if you activate a spore, you can kite it around and when it blows up it will damage nearby enemies. You can use that to your advantage!

If you're doing "Scavenger Hunt" the boss at the end is easy: there are two islands. When the boss starts to cast "sporesong" run to the island to avoid the spores. rinse and repeat.