Grease

Source grease

If you cast mythic grease on an area, add your tier to the Acrobatics DC to move within or through the area. If you cast it on a creature's armor or clothing, add your tier to its Escape Artist checks and combat maneuver checks attempted to escape a grapple and to its CMD to avoid being grappled.

Augmented: You can expend two uses of mythic power to make the grease flammable. It ignites from any fire at least the size of a candle flame. If a greased area is ignited, any creature in the area on your turn takes 1d3 points of fire damage and might catch on fire. If a greased creature is ignited, it takes 2d6 points of fire damage, and might catch on fire; add your tier to the save DC.