After all, to steal a spell you first have to survive having it cast against you
Enter the Bargain, with twice the cost, only skips your draw step, you draw them immediately to cast them or in response to something, and it's even legal as a four of in Vintage where it used to be on the B&R list
Whenever you cast a spell, if the amount of mana spent to cast that spell is greater than Liberators power, put a +1/+1 counter on Liberator
It mostly shines in dinosaur decks and out of the sideboard against blue decks
(Yes, you can play a commander just for the colors, but that is boring and I dont want to talk about a weird Vintage variant where you have a random card dictating what goes into your deck for no reason.) The most notorious commanders are central to the deck for the consistency and synergy they provide