
Instant
Choose one. If you control a commander as you cast this spell, you may choose both instead.
• Creatures you control gain flying, vigilance, and double strike until end of turn.
• Creatures you control gain lifelink, indestructible, and protection from each color until end of turn.

Cheap instant granting hexproof and indestructible to your board for protection.

Flicker-style protection saving your team from board wipes.

Free indestructible team protection when commanding, similar anthem-protection role.

Phases out your whole board for total protection.

Combat finisher pumping your team for lethal alpha strike.

Classic explosive game-ending team buff alongside Will's combat boost.

White anthem with lifegain synergy supporting aggressive go-wide swings.

Cheap white instant giving indestructible to survive removal or block.
"Protection from each color" is shorthand for protection from white, from blue, from black, from red, and from green. Colorless is not a color.
There's no extra bonus if you control more than one commander.
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.
Even though the card is named after a specific character, controlling any commander will satisfy its condition.
The commander you control doesn't have to be your commander.
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.