Form of the Dragon is an old favorite of mine, and Form of the Dinosaur in RIX is looking much the same. So, I thought, why don't we apply this to Commander?
1. The entry must be a legendary enchantment.
2. The entry must be able to be played as your commander.
3. The entry's title must begin with 'Form of'.
4. The entry should alter your life total in some way.
5. The entry should have at least one more additional ability.
Beyond that, colors, costs, abilities, what (or who (or even where) you transform into, and all the other specifics are at your discretion.
I will provide thoughts/feedback on all entries. There is no limit per person, but I recommend focusing on quality over quantity. Deadline is in two weeks.