Pain, Preta Path

Preta Preoccupy: {6}: Counter target
Non-creature, Non-Planeswalker spell. At the
beginning of your next main phase, add an
amount of {1} equal to that spell's mana value.
If you would counter a spell with,{c} in its mana
cost, Flip a coin. If you lose the flip, this creature
becomes an Golem artifact creature with base
power and toughness 0/10 and has
indestructible and Defender, and it loses all other
abilities, card types, and creature types.