Pim blinks, and suddenly, he finds his position a lot better than before. He will pull himself to the top of the ledge, and begins to cast a spell. His balance spooks him a little, as he lets out a little "Whoah", and he teeters slightly towards the edge.
He draws a card, which is magically charged with a blue energy like crystals that drip down and eventually become snow powder that gets swept away by the breeze. A hard throw down at the white simian is also accompanied by Pim's defensive cards, which now project at full strength to shield him.

Spoiler: Actions
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Move: Get to the top
Standard: Cast Frigid Touch
Free: Attack White Ape
(1d20+9)[29]
damage: (1d3+1)[4] + frigid touch (no save) (4d6)[11] + STAGGER 1/rd
(if crit: stagger 1 min)