A player who has priority may cast a planeswalker card from their hand during a main phase of their turn when the stack is empty
Players will find familiar faces and concepts like Auron, Venerated Guardian, Summon: Valefor, Blitzball Stadium, and even Sin, Unending Cataclysm
Aradesh, the Founder Aradesh, the Founder is a fine Voltron commander
Gandalf the White could see play in legend-heavy Commander decks with white mana as a support card, but on the whole, legendary flash isn't a strong enough effect for Gandalf the White to be a viable Commander
Its one of the strongest game actions you can take, since the cards in your hand represent your options at any given moment
An effect like Impulse doesn't have the word draw in it, so it doesn't count for Sheoldred