While damage can still accrue if your opponent has a card with a 'damage can't be prevented' effect, that damage still can't be dealt until the Terefi's Protection has been lifted on your next turn, and your lifetotal can be adjusted again
Alisaie Leveilleur and Alphinaud Leveilleur: The only partner with pairing in the Commander set, and they come together to create a nice double-spell package
She also reads: At the beginning of your end step, choose target creature card in your graveyard
Every time its equipped creature deals damage, it earns a charge counter that you can spend to untap a land, prevent a creature from blocking, or give your attacker a +1/+1 boost
Quantum Misalignment, an expensive clone effect, but worth mentioning due to how popular Irenicus's Vile Duplication is