Disassembly

This spell can only target a creature with
assembling.
Disassemble target creature: split it in half.
The half without the power and toughness
indicator becomes a copy of the original
creature with half its power and toughness
The other half of the disassembled creature
does the same. The disassembled creature
is no longer a creature, but it can still deal
damage. It is now an artifact only.