With these cards, we can simply cast a Glorious End to make our opponent skip their turn and then, when it comes time to pay the price during our end step, counter or exile the "you lose the game trigger." Problem solved
Transforming Matzalantli doesn't cause it to leave the battlefield
Gandalf comes with four abilities, you can choose each one until you've chosen them all, each time you cast an instant or sorcery spell
Otherwise, Vial Smasher the Fierce is oddly appealing, which is strange for me to say because I'm not usually a fan of aggressive commanders
Elas il-Kor, Sadistic Pilgrim Buffs: Short, simple, and to the point: Elas il-Kor, Sadistic Pilgrim heals a damage when a creature you control enters, and Elas il-Kor, Sadistic Pilgrim deals a damage when a creature you control dies