To shroud yourself in enemy-damaging steam, blend Ice with a Burn power-up so you'll quickly freeze and thaw yourself.”
— Description • Nintendo Power (Volume #134)
Melting Ice Block is a Power Combo in Kirby 64: The Crystal Shards. It is made by combining the Burning and Ice abilities. Kirby freezes himself into an ice cube, then quickly melts himself in a heat burst. The ice below can defeat enemies from above while the steam coming off the top can defeat enemies at close range. Kirby cannot move while he is in the ice cube, unless it was while he was jumping.
Due to the incredibly short attack range, and the fact enemies have to be in dangerously close proximity to Kirby for it to even work, it isn't recommended for fights against bosses or mid-bosses.
Freeze & Melt
Kirby becomes a block of ice quickly, then melts himself. The steam fries enemies.