Taking that ability and putting it onto your Commander or any other creature is ridiculous
This one hits on a different angle to most MTG Equipment, so I expect it to see play far beyond decks like this one
Vorinclex, Monstrous Raider Vorinclex, Monstrous Raider is similar to Doubling Season but on a 6/6 with haste
You can ready chosen character at a location and they can't quest for the rest of the turn but you do gain the lore equal to that location's lore
Emrakul, the Promised End was a great mythic addition to the Magic set that brought us delirium: it works a a solid delirium commander even if the card doesn't technically use the mechanic
Each time Serra's Emissary enters the battlefield, it allows you to change the card type you gain protection from, so you can gain protection from whatever you think might be the biggest threat to you at the time