Ironheart Heavyweight

As Ironheart Heavyweight enters the battlefield,
choose a number. Ironheart Heavyweight's
power and toughness each become that number.
Ironheart Heavyweight can't attack or block
unless you pay {x}, where X is its power.
"They sent the largest monster they had after us. Fortunately, it's difficult to operate at that size."
- Ordaniwen's Journal, entry 9