Beanstalk Giant // Fertile Footsteps Putting extra land onto the battlefield, aka ramping, is one of the most powerful things you can do in MTG, especially in commander
To play around , for instance, a pile of , , , , casts with an empty library and only 2 cards in your graveyard
Honestly, even without Dryad Arbor, Im a little afraid of it in Devoted Druid combo decks, but at least Im only really worried about it there and not also in Infect, G/W Hexproof, Primeval Titan strategies, any Tarmogoyf deck, etc etc
Hell also return any bombs that your opponent may have been able to banish
Ponder was banned primarily to keep combo decks in check by making them less consistent, but remember: this was back during an era of Magic when Storm was consistently one of the top-performing decks in the meta