2020-11-10 : Even though the card is named after a specific character, controlling any commander will satisfy its condition.

2020-11-10 : Once you've announced that you're casting a spell, players can't take any actions until you've finished doing so. Notably, opponents can't try to remove your commander to change how many modes you may choose.

2020-11-10 : Once you've chosen both modes for the spell, it doesn't matter whether you continue to control a commander. This is true even if you somehow no longer control a commander as you finish casting the spell.

2020-11-10 : The commander you control doesn't have to be your commander.

2020-11-10 : There's no extra bonus if you control more than one commander.