Monsters weak to oil? What oil?

I'm playing the newly released Magicka: Wizards of the Square Tablet for the iOS and have read that the Seagul is the only creature weak to Oil. Oil? I haven't seen any oil in the game? How do I use oil? I can only assume this is a as-yet undiscovered spell combo but I haven't been able to find anything on this. Any ideas?

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2 Answers

There is a robe called the 'Contaminated Robe' that says 'Spells inflict Oil status instead of Wet status'. This is the only other reference I've found to 'Oil' so far.

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Well there are two ways of getting oil: using the contaminated robe with water and the oil rain spell. Earth, water, water, earth, or water surrounding the earth.

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