Angelic Soul Sisters not only gains you a ton of life but also rewards you for it by giving you 4/4 angle tokens, even when it's not your turn. The main combo relies on you playing both Angelic Accord and Path of Bravery. The secondary phase is all about life gain, any and every way you can manage it. Have a couple soul sisters out? Play Spectral Procession, get an angel during your end step. Use Last Breath on one of your spirit tokens during your opponent's turn, get an angel during their end step. You're essentially trading 1/1's for a 4/4 flyer, that's a good trade. With Path of Bravery out you can just tap four creatures to attack and gain four life which results in an angel. There's no real creature removal in the main board it's really more about gaining life and then beating your opponent down with an army of angels.