Ice

What are Ice Match-3 Elements? This element freezes up a piece and they cannot be moved, similar to a chain. You need to remove the ice in order to move the piece that's frozen.

You need to match pieces with the frozen one in order to remove the ice, or use a power up. Ice can cover not only pieces, but other Match-3 Elements as well. If they cover an element, you can only remove it using a power up.