Erebor, Desolation of Smaug

At the beginning of your upkeep, create a 1/1 red Dwarf creature token. If you control ten or more dwarves, instead you may create a legendary
10/10 red Dragon creature token with flying, trample, and indestructible named Smaug, the Desecrator.
You can't cast creature spells. You may
pay {4} to ignore this effect until end of turn.