mtg d&d dragon cards Brainstealer Whenever this creature enters or attacks Dragons - The Ur-Dragon -

This means you can board-wipe your opponents and leave yourself free to do whatever you want

What's best, your opponent is the one who divides up the pile

Darksteel Mutation is an underrated piece of commander removal, as many decks without graveyard interactions won't be able to play their commander after being enchanted

That said, you cant go wrong with any of these

Healing Salve was the worst on this list, as gaining or preventing three life is not as good as, say producing three mana, just outright making your creature +3/+3, killing a creature/dealing damage, or drawing three cards

It will tap at minimum for one green mana since it counts itself, but can tap to add one mana of every color if you have every color of permanent on the battlefield