I can see having cards in your deck that tap potential attackers, like Icy Manipulator and Opposition, so if an opponent doesnt draw a card from your commanders ability, you know you can keep your tap-down effects ready for potential attackers from their side of the battlefield
Cumulative Upkeep Pay 2 Life, for which you couldnt attack but had a safe barrier between you and damage as it said, Prevent all damage that would be dealt to you. Of course, youd still have to deal with Glacial Chasm itself hitting you every turn
But if your creature is dying to state-based actions (like lethal damage or 0 toughness), you may not get a window
If those combos arent your thing, then you should consider how to convert a board of tokens or small value creatures into a win condition with a card like Moonshaker Cavalry
Ideally you're putting the counter on an Attraction that has 3 lights lit up so you have a 50/50 of getting the exiled spell each turn
Unless it's a transforming sagasee below