Nature Spirit

Talk to Drezel, who is located underground near Paterdomus. The entrance is north from the temple's door. You should have six empty backpack space; otherwise the food he gives you will appear on the floor.

If you have lost Wolfbane:

If you have Wolfbane in your bank or backpack:

If you have just completed Priest in Peril, then you might need to exit and reenter the Mausoleum before the quest dialogue will appear. Drezel should be standing in the last chamber before the holy barrier.

Exit into Morytania and travel south to a fence.

Look along the fence for a gate and go through it.

Go south until a round island is found with a grotto tree.

Jump across the broken bridge and onto the island.

Search the bench nearby for a small mirror.

Search the grotto tree for Filliman's journal.

Equip your ghostspeak amulet and talk to Filliman Tarlock.

Use the mirror on Filliman to prove he's a ghost.

He'll give you a druidic spell.

Return to Drezel to be blessed and teleported back to Filliman.

If you have lost the wolfbane:

If you have the wolfbane in your backpack or bank:

Jump the bridge and find a nearby rotting log in the swamp.

There is some directly West of the Grotto tree island.

Cast the druidic spell in your backpack, then pick the fungus from the log.

Take the Mort myre fungus mushroom from the log and talk to Filliman.

Use the Mort myre fungus on the western, yellow stone.

Use a used spell on the eastern, grey stone.

Stand on top of the southern, orange stone in the centre by right-click selecting "Walk here".

Tell Filliman the puzzle is solved.

Enter the Grotto tree.

Search the Grotto in the centre.

Continue speaking with Nature Spirit and he will ask you for a silver sickle.

Obtain a silver sickle via:

Purchasing it from the Grand Exchange.

Crafting one yourself:

Obtain a sickle mould from a Crafting shop or the Grand Exchange. You may add it to the tool belt.

Smelt at a furnace with a silver bar. Select "silver bar" under "Casting Metals & Glass" section on the interface, and then select the "silver sickle" option in the "Silver Casting" section.

Return to the grotto either by speaking to Drezel, or by navigating via the Morytania Swamp.

Enter the grotto tree.

Talk to the Nature Spirit with a silver sickle in your backpack. He will bless it for a silver sickle (b).

Exit the grotto, jump the bridge into the swamp and stand next to the nearby rotting log.

Right-click Bloom the silver sickle (b) in your backpack. Blooming requires at least 1 prayer point.

Pick the fungi from the log. You will need at least 3 total fungi (ghasts can rot the contents of the pouch).

Fill the druid pouch in your backpack to add the fungi into it.

Invoke and kill 3 nearby ghasts, consuming 1 fungus per invocation.

If you drop anything to receive the rewards, it will be lost.

Return to the Nature Spirit in the grotto.

Quest complete!

(Optional) Pray at the altar to complete one of the easy Morytania achievements, Fortified Spirit.