Jötunn's Ice Floe

Ice Magic: Jötunn's Ice Floe (氷魔法『ヨトゥンの大氷塊』) is an Ice Magic spell.

Description
With an open grimoire, the user creates a massive chunk of ice and drops it onto an opponent, crushing them under the weight.

Trivia

 * A jötunn is a type of being from Norse mythology and the term is often translated as "giant."